.
| Genus | |
|---|---|
|   | Abelia R.Br. | 
|   | Abelmoschus Medik. | 
|   | Abies Mill. | 
|   | Abronia Juss. | 
| Abrotanella Cass. | |
|   | Abutilon Mill. | 
|   | Acacia Mill. | 
|   | Acaena Mutis ex L. | 
|   | Acanthocalycium Backeb. | 
| Acanthocarpus Lehm. | |
|   | Acanthocereus (Engelm. ex A. Berger) Britton & Rose | 
| Acanthochlamys P.C.Kao | |
|   | Acanthogilia A.G.Day & Moran | 
|   | Acantholimon Boiss. | 
|   | Acanthosicyos Welw. ex Benth. & Hook.f. | 
| Acanthostachys Link | |
|   | Acanthus L. | 
| Acareosperma Gagnep. | |
|   | Acer L. | 
|   | Acetabularia J.V.Lamouroux | 
|   | Acharagma (N.P. Taylor) Glass | 
|   | Achillea L. | 
|   | Achimenes P.Browne | 
|   | Acicarpha Juss. | 
| Acidocroton Griseb. | |
| Acidonia L.A.S.Johnson & B.G.Briggs | |
|   | Acis Salisb. | 
|   | Acokanthera G.Don | 
|   | Aconitum L. | 
|   | Acourtia D.Don | 
|   | Acranthera Arn. ex Meisn. | 
| Acrisione B.Nord. | |
| Acrodon N.E.Br | |
| Acrosanthes Eckl. & Zeyh. | |
|   | Actaea L. | 
|   | Actinodium S.Schauer ex Schltdl. | 
| Actinostachys Wall. | |
|   | Actinotus Labill. | 
|   | Adelinia J.I.Cohen | 
|   | Adelonema Schott | 
|   | Adenanthos Labill. | 
|   | Adenia Forssk. | 
|   | Adenium Roem. & Schult. | 
|   | Adenocaulon Hook. | 
|   | Adenophora Fisch. | 
|   | Adenophorus Gaudich. | 
|   | Adenosma R.Br. | 
|   | Adenostyles Cass. | 
|   | Adesmia DC. | 
|   | Adiantum L. | 
|   | Adonis L. | 
| Adoxa L. | |
|   | Adromischus Lem. | 
|   | Aechmea Ruiz & Pav. | 
| Aegiceras Gaertn. | |
|   | Aeginetia L. | 
|   | Aegonychon Gray | 
|  | Aeonium Webb & Berthel. | 
| Aequatorium B.Nord. | |
|   | Aeschynanthus Jack | 
|   | Afgekia Craib | 
|   | Agalinis Raf. | 
|   | Agapanthus L'Hér. | 
|   | Agapetes G.Don | 
|   | Agarista D.Don ex G.Don | 
|   | Agastache Clayton ex Gronov. | 
|   | Agastachys R.Br. | 
|   | Agave L. | 
|   | Aglaodorum Schott | 
|   | Aglaomorpha Schott | 
|  | Aglaonema Schott | 
|   | Agoseris Raf. | 
|   | Agrimonia L. | 
|   | Aichryson Webb & Berthel. | 
|   | Ainsliaea DC. | 
| Airampoa FriÄ | |
|  | Aizoanthemopsis Klak | 
| Aizoanthemum Dinter ex Friedrich | |
|   | Aizoon L. | 
|   | Ajuga L. | 
| Alangium Lam. | |
| Albidella Pichon | |
|   | Albuca L. | 
|   | Alcantarea (É.Morren ex Mez) Harms | 
|   | Aldrovanda L. | 
|   | Aletris L. | 
|   | Alfredia Cass. | 
|   | Aliciella Brand | 
|   | Alisma L. | 
|   | Alkanna Tausch | 
| Alkekengi Mill. | |
|   | Allamanda L. | 
|   | Allardia Decne. | 
|   | Alliaria Heist. ex Fabr. | 
|   | Allionia L. | 
|   | Allium L. | 
|   | Allophyllum (Nutt.) A.D.Grant & V.E.Grant | 
| Alloschemone Schott | |
|   | Allotropa Torr. & A.Gray | 
| Alloxylon P.H.Weston & Crisp | |
|  | Alluaudia (Drake) Drake | 
|   | Alluaudiopsis Humbert & Choux | 
|   | Alocasia (Schott) G.Don | 
|   | Aloe L. | 
| Aloestrela Molteno & Gideon F.Sm. | |
|   | Aloidendron (A.Berger) Klopper & Gideon F.Sm. | 
|   | Aloinopsis Schwantes | 
|   | Alpinia Roxb. | 
| Alrawia (Wendelbo) Perss. & Wendelbo | |
| Alseuosmia A.Cunn. | |
|   | Alsobia Hanst. | 
|   | Alsophila R.Br. | 
|   | Alstonia R.Br. | 
|   | Alstroemeria L. | 
|   | Althaea L. | 
|   | Alyxia R.Br. | 
|   | Amaryllis L. | 
| Amblyanthopsis Mez | |
| Amblyanthus A.DC. | |
|   | Amelanchier Medik. | 
|   | Amherstia Wall. | 
|  | Amianthium A.Gray | 
|   | Ammocharis Herb. | 
|   | Ammodendron Fisch. ex DC. | 
|   | Amomum Roxb. | 
|   | Amorpha L. | 
|   | Amorphophallus Blume ex Decne. | 
| Ampelocissus Planch. | |
|   | Ampelopsis A.Rich. ex Michx. | 
| Amphibolia L.Bolus ex A.G.J.Herre | |
|   | Amphitecna Miers | 
|   | Amsinckia Lehm. | 
|   | Amsonia Walter | 
| Amydrium Schott | |
|   | Amyema Tiegh. | 
|   | Anabasis L. | 
|   | Anacampseros L. | 
|   | Anacardium L. | 
| Anadendrum Schott | |
|  | Anagallis L. | 
|   | Ananas Mill. | 
|   | Anaphalioides (Bentham) Kirpichnikov | 
| Anaphyllopsis A.Hay | |
|   | Anaphyllum Schott | 
|   | Anarthrophyllum Benth. | 
|   | Anastatica L. | 
|   | Anchomanes Schott | 
|   | Anchusa L. | 
|   | Ancylobothrys Pierre | 
|   | Andersonglossum J.I.Cohen | 
| Andesanthus P.J.F.Guim. & Michelang. | |
|   | Andrographis Wall. ex Nees | 
| Androlepis Brongn. ex Houllet | |
|   | Andromeda L. | 
|   | Andropogon L. | 
|   | Androsace L. | 
| Androstephium Torr. | |
|   | Aneilema R.Br. | 
| Anemarrhena Bunge | |
| Anemoclema (Franch.) W.T.Wang | |
|   | Anemonastrum Holub | 
|   | Anemone L. | 
|   | Anemonella Spach | 
|   | Anemonoides Mill. | 
|   | Anemonopsis Siebold & Zucc. | 
| Anemopsis Hook. & Arn. | |
| Angelica L. | |
|   | Angiopteris Hoffm. | 
|   | Anigozanthos Labill. | 
|   | Anisodus Link ex Spreng. | 
| Anisomeria D.Don | |
|   | Anisopappus Hook. & Arn. | 
| Anisosepalum E.Hossain | |
|   | Annona L. | 
| Anomacanthus R.D.Good | |
| Antegibbaeum Schwantes ex C.Weber | |
| Anthemis L. | |
|   | Anthericum L. | 
|   | Anthobolus R.Br. | 
|   | Anthocercis Labill. | 
|   | Anthoceros L. | 
|   | Anthotium R.Br. | 
|   | Anthotroche Endl. | 
|   | Anthurium Schott | 
|   | Anticlea Kunth | 
|   | Antidaphne Poepp. & Endl. | 
|   | Antigonon Endl. | 
| Antillanthus B.Nord. | |
| Antimima N.E.Br | |
| Antistrophe A.DC. | |
| Apatesia N.E.Br | |
|   | Aphelandra R.Br. | 
| Aphyllanthes L. | |
|   | Apiopetalum Baill. | 
|   | Apium | 
|   | Apocynum L. | 
| Apodanthes Poit. | |
|   | Apodolirion Baker | 
| Aporoheliocereus C.Knebel ex Airy Shaw | |
|   | Aporosa Blume | 
|   | Apteranthes J.C.Mikan | 
|   | Apteria Nutt. | 
| Aquarius Christenh. & Byng | |
|   | Aquilegia L. | 
|   | Arabis L. | 
| Araeococcus Brongn. | |
|   | Aralia L. | 
|   | Arbusculohypopterygium M.Stech, T.Pfeiff. & W.Frey | 
|   | Arctium L. | 
|   | Arctomecon Torr. & Frém. | 
|  | Arctotheca Vaill. | 
|   | Ardisia Sw. | 
| Ardisiandra Hook. f. | |
|   | Aremonia Neck. ex Nestl. | 
|   | Arenaria Ruppius ex L. | 
|   | Argemone L. | 
|   | Argentina Hill | 
|   | Argostemma Wall. | 
|   | Argylia D.Don | 
|   | Argyranthemum Webb | 
|   | Argyreia Lour. | 
|   | Argyroderma N.E.Br | 
|   | Argyroxiphium DC. | 
|   | Ariocarpus Scheidw. | 
|   | Arisaema Mart. | 
|   | Arisarum Mill. | 
|   | Aristaloe Boatwr. & J.C.Manning | 
| Aristea Aiton | |
|   | Aristolochia L. | 
|  | Arjona Comm. ex Cav. | 
|   | Armatocereus Backeb. | 
|   | Arnebia Forssk. | 
|   | Arnica L. | 
|   | Arnoglossum Raf. | 
|   | Arrojadoa Britton & Rose | 
| Arrojadocharis Mattf. | |
|   | Artemisia L. | 
| Arthrocereus A. Berger | |
|   | Arthropodium R.Br. | 
|   | Arum L. | 
|   | Asarum L. | 
|   | Asclepias L. | 
|   | Asemeia Raf. | 
|   | Asimina Adans. | 
|   | Asparagus Tourn. ex L. | 
|   | Asperula L. | 
|   | Aspidistra Ker Gawl. | 
|   | Asplenium L. | 
|   | Astelia Banks & Sol. ex R.Br. | 
|   | Astephanus R.Br. | 
|   | Aster L. | 
|   | Asterella P. Beauv. | 
| Asteropyrum J.R.Drumm. & Hutch. | |
|   | Asterostigma Fisch. & C.A.Mey. | 
|   | Astragalus L. | 
|   | Astrantia L. | 
| Astridia Dinter | |
|  | Astrophytum Lem. | 
|   | Asyneuma Griseb. & Schenk | 
|   | Atalantia Corrêa | 
| Athertonia L.A.S.Johnson & B.G.Briggs | |
|   | Athyrium Roth | 
|   | Atractylis L. | 
|   | Atraphaxis L. | 
| Atriplex L. | |
|   | Atropa L. | 
|   | Aulax P.J.Bergius | 
|   | Aureliana Sendtn. | 
|   | Aureolaria Raf. | 
|  | Austrocactus Britton & Rose | 
|   | Austrocallerya J.Compton & Schrire | 
|  | Austrocylindropuntia Backeb. | 
|   | Austrolycopodium Holub | 
| Austromuellera C.T.White | |
|   | Austromyrtus (Nied.) Burret | 
|   | Avena L. | 
| Averrhoa L. | |
| Avicennia L. | |
| Ayensua L.B.Sm. | |
|  | Azorella Lam. | 
|   | Azorina Feer | 
|   | Aztekium Boed. | 
|   | Babiana Ker Gawl. | 
|   | Baccaurea Lour. | 
| Bactris Jacq. ex Scop. | |
| Badula Juss. | |
|   | Baeometra Salisb. ex Endl. | 
| Baeriopsis J.T.Howell | |
|   | Balanophora J.R.Forst. & G.Forst. | 
| Baliospermum Blume | |
|   | Ballota L. | 
| Baloghia Endl. | |
|   | Banksia L.f. | 
|   | Baptisia Vent. | 
|   | Barbacenia Vand. | 
| Barbaceniopsis L.B.Sm. | |
|   | Barbarea Scop. | 
|   | Barclaya Wall. | 
| Barfussia Manzan. & W.Till | |
| Barkleyanthus H.Rob. & Brettell | |
|   | Barleria L. | 
|   | Barnardia Lindl. | 
| Barneoudia Gay | |
|   | Barringtonia J.R.Forst. & G.Forst. | 
|   | Bartonia Muhl. ex Willd. | 
|   | Bassecoia B.L.Burtt | 
|   | Bauhinia B.Heyne ex Wight & Arn. | 
| Bdallophytum Eichler | |
| Beaucarnea Lem. | |
| Beauprea Brongn. & Gris | |
| Beaupreopsis Virot | |
| Bedfordia DC. | |
|   | Beesia Balf.f. & W.W.Sm. | 
| Behnia Didr. | |
|   | Bejaria Mutis | 
|   | Bellendena R.Br. | 
|   | Bellevalia Lapeyr. | 
| Belosynapsis Hassk. | |
|   | Benthamiella Speg. | 
|   | Berberidopsis Hook.f. | 
|   | Berberis L. | 
| Bergeranthus Schwantes | |
| Bergerocactus Britton & Rose | |
|   | Berlinia Sol. ex Hook.f. & Benth. | 
|   | Berteroa DC. | 
|   | Berzelia Brongn. | 
|  | Beschorneria Kunth | 
|  | Besleria Plum. ex L. | 
| Bessera Schult.f. | |
| Bethencourtia Choisy | |
|   | Betula L. | 
|   | Biarum Schott | 
|   | Bidens L. | 
|   | Bignonia L. | 
|   | Billardiera Sm. | 
|   | Billbergia Thunb. | 
| Biophytum DC. | |
|   | Bistorta (L.) Scop. | 
|   | Bituminaria Heist. ex Fabr. | 
| Blachia Baill. | |
|   | Blackstonia Huds. | 
|   | Blakea P.Browne | 
|   | Blancoa Lindl. | 
|   | Blandfordia Sm. | 
| Bleasdalea F.Muell. ex Domin | |
|   | Blechnum L. | 
| Blennosperma Less. | |
|   | Blepharipappus Hook. | 
|   | Blephilia (L.) Raf. | 
| Bloomeria Kellogg | |
|   | Blossfeldia Werderm. | 
|   | Bobartia L. | 
| Boechera Á.Löve & D.Löve | |
|   | Boenninghausenia Rchb. | 
|   | Boesenbergia Kuntze | 
| Bolandra Gray | |
|   | Bomarea Mirb. | 
|   | Bonamia Thouars | 
| Bonellia | |
|   | Boophone Herb. | 
|   | Boopis Juss. | 
| Borodinia Busch | |
|   | Boronia Sm. | 
|   | Boswellia Roxb. ex Colebr. | 
|   | Botrychium Sw. | 
|   | Boucerosia Wight & Arn. | 
|   | Bourreria P.Browne | 
| Bouteloua Bouteloua | |
|   | Bouvardia Salisb. | 
|   | Bowiea Harv. ex Hook.f. | 
|   | Bowkeria Harv. | 
| Boykinia Nutt. | |
| Brabejum L. | |
| Brachycereus Britton & Rose | |
|   | Brachyclados D.Don | 
| Brachyglottis J.R.Forst. & G.Forst. | |
|   | Brachyotum (DC.) Triana | 
|   | Brachytome Hook.f. | 
|   | Brandisia Hook.f. & Thomson | 
|   | Brasenia Schreb. | 
|   | Brasilicereus Backeb. | 
| Brasiliopuntia (K. Schum.) A. Berger | |
|   | Brassica L. | 
| Braunsia Schwantes | |
|   | Brefeldia Rostaf. | 
|  | Brexia Noronha ex Thouars | 
| Brianhuntleya Chess. et al. | |
|   | Brighamia A.Gray | 
|   | Brimeura Salisb. | 
|   | Brocchinia Schult. & Schult.f. in J.J.Roemer & J.A.Schultes | 
| Brodiaea Sm. | |
|   | Bromelia L. | 
|   | Bromus L. | 
|   | Broussonetia Ortega | 
|   | Browallia L. | 
|   | Brownea Jacq. | 
|   | Browneopsis Huber | 
|   | Browningia Britton & Rose | 
|   | Brugmansia Pers. | 
|   | Brunfelsia L. | 
| Brunia L. | |
|   | Brunnera Steven | 
|   | Brunonia R.Br. | 
|   | Brunsvigia Heist. | 
| Bryocarpum Hook. f. & Thomson | |
|   | Bucephalandra Schott | 
|   | Buchnera L. | 
| Buckinghamia F.Muell. | |
| Bucklandiella Roiv. | |
|   | Buddleja L. | 
|   | Bufonia Sauvage | 
|   | Buglossoides Moench | 
|   | Bukiniczia Lincz. | 
|   | Buphthalmum Mill. | 
|   | Bupleurum L. | 
|   | Burmannia L. | 
|   | Cabomba Aubl. | 
| Cacaliopsis A.Gray | |
| Caesalpinia (L. 1753) E. Gagnon & G. P. Lewis | |
|   | Caiophora C.Presl | 
|   | Cakile Mill. | 
|  | Caladium Vent. | 
| Calathodes Hook.f. & Thomson | |
|   | Calceolaria L. | 
|   | Calectasia R.Br. | 
| Calibanus Rose | |
|   | Calibrachoa Cerv. | 
|   | California Aldasoro et al. | 
|   | Callerya Endl. | 
|   | Calliandra Benth. | 
| Callianthe Donnell | |
|   | Callianthemoides Tamura | 
|   | Callianthemum C.A.Mey. | 
|   | Callicarpa L. | 
|   | Calligonum L. | 
|   | Callirhoe Nutt. | 
|   | Callisia (Ortgies) D.R.Hunt | 
|   | Calochortus Pursh | 
|   | Calorezia Panero | 
|   | Calotropis R.Br. | 
|   | Caltha L. | 
|   | Calycanthus L. | 
|   | Calycera Cav. | 
| Calymmanthium F. Ritter | |
|   | Calyptrogyne H.Wendl. | 
|   | Calyptronoma Griseb. | 
|   | Calystegia R.Br. | 
|   | Camassia Lindl. | 
|   | Camchaya Gagnep. | 
|   | Camellia L. | 
| Camissonia Link | |
| Camissoniopsis W.L.Wagner & Hoch | |
|   | Camonea Raf. | 
|   | Campanula L. | 
|   | Campanulastrum Small | 
| Camptorrhiza Hutch. | |
| Campylandra Baker | |
|   | Campyloneurum C.Presl | 
|   | Campylotropis Bunge | 
|   | Canarina L. | 
|   | Canbya Parry ex A.Gray | 
| Canistrum É.Morren | |
|   | Canna L. | 
|   | Cannabis L. | 
|   | Canscora Lam. | 
|   | Cantua Juss. | 
| Capelio B.Nord. | |
|   | Capparis Tourn. ex L. | 
|   | Capraria L. | 
|   | Caputia B.Nord. & Pelser | 
|   | Caragana Lam. | 
|   | Caralluma R.Br. | 
|   | Cardamine L. | 
|   | Cardiocrinum (Endl.) Lindl. | 
|   | Carduus L. | 
| Cardwellia F.Muell. | |
|   | Carex L. | 
|   | Carlina L. | 
|   | Carludovica Ruiz & Pav. | 
| Carnarvonia F.Muell. | |
|   | Carnegiea Britton & Rose | 
| Carpanthea N.E.Br | |
|   | Carphephorus Cass. | 
|   | Carpobrotus N.E.Br | 
|   | Carruanthus (Schwantes) Schwantes | 
|   | Carthamus L. | 
|   | Cartonema R.Br. | 
|   | Casearia Jacq. | 
|   | Cassiope D.Don | 
|   | Castanea Mill. | 
|   | Castanopsis (D.Don) Spach | 
| Castellanosia Cárdenas | |
|   | Castilleja Mutis ex L.f. | 
| Catalepidia P.H.Weston | |
|  | Catananche L. | 
| Cathaya Chun & Kuang | |
|   | Catopsis Griseb. | 
| Caucasalia B.Nord. | |
|   | Caulokaempferia K.Larsen | 
|   | Caulophyllum Michx. | 
|   | Cavendishia Lindl. | 
| Caxamarca M.O.Dillon & Sagást. | |
| Cayratia Juss. | |
|   | Ceanothus L. | 
| Cedrus Trew | |
|   | Ceiba Mill. | 
|   | Celastrus L. | 
|   | Celmisia Cass. | 
| Cenarrhenes Labill. | |
|   | Cenchrus L. | 
|   | Cenocentrum Gagnep. | 
|   | Centaurea L. | 
|   | Centaurium Hill | 
|   | Centella L. | 
|   | Centranthera R.Br. | 
|   | Centropogon C.Presl | 
|   | Cephalanthus L. | 
|   | Cephalaria Schrad. | 
|  | Cephalocereus Pfeiff. | 
| Cephalophyllum N.E.Br | |
|  | Cephalotus Labill. | 
|   | Cerastium Tourn. ex L. | 
|   | Ceratiola Michx. | 
|   | Ceratostema Juss. | 
|   | Ceratostigma Bunge | 
| Ceratotheca | |
|   | Cercis L. | 
| Cercocarpus Kunth | |
|   | Cereus Mill. | 
|   | Cerinthe L. | 
| Cerochlamys N.E.Br | |
|   | Ceropegia L. | 
|   | Ceroxylon Bonpl. ex DC. | 
|   | Cestrum L. | 
|   | Chaetanthera Ruiz & Pav. | 
|   | Chaetogastra DC. | 
| Chalmasia Solms-Laubach | |
| Chaloupkaea Niederle | |
| Chamaebatia Benth. | |
|   | Chamaecostus C.D.Specht & D.W.Stev. | 
|   | Chamaeleon Cass. | 
|  | Chamaelirium Willd. | 
|   | Chamaerops L. | 
|   | Chamaesaracha (A.Gray) Benth. & Hook.f. | 
| Chamaescilla F.Muell. ex Benth. | |
| Chamaexeros Benth. | |
|   | Chaptalia Vent. | 
| Chasmatophyllum Dinter & Schwantes | |
|   | Chayamaritia D.J.Middleton & Mich.Möller | 
|  | Cheiridopsis N.E.Br | 
| Cheirolophus Cass. | |
|   | Chelidonium L. | 
|   | Chelone L. | 
|   | Chenopodium L. | 
| Chersodoma Phil. | |
|   | Chesneya Lindl. ex Endl. | 
|   | Chiliotrichum Cass. | 
|   | Chilopsis D.Don | 
|   | Chimaphila Pursh | 
|   | Chimonanthus Lindl. | 
|   | Chionanthus L. | 
| Chionocharis I.M.Johnst. | |
| Chionodoxa Boiss. | |
|   | Chironia L. | 
| Chlaenosciadium C.Norman | |
| Chlorogalum (Lindl.) Kunth | |
| Chloropetalum Morillo | |
|   | Chlorophytum Ker Gawl. | 
|   | Chorispora R.Br. ex DC. | 
| Christensenia Maxon | |
|   | Christia Moench | 
|   | Christisonia Gardner | 
|   | Chrysophyllum L. | 
|   | Chrysopsis (Nutt.) Elliott | 
|   | Chrysothemis Decne. | 
| Chunia H.T.Chang | |
|   | Chuquiraga Juss. | 
| Chylismia (Torr. & A.Gray) Raim. | |
| Chylismiella (Munz) W.L.Wagner & Hoch | |
|   | Cicerbita Wallr. | 
|   | Cichorium L. | 
| Cineraria L. | |
|   | Cipocereus F. Ritter | 
| Cipuropsis Ule | |
| Circaea L. | |
| Circandra N.E.Br | |
|   | Cirsium Mill. | 
| Cissampelopsis Miq. | |
|   | Cissus L. | 
|   | Cistanche Hoffmanns. & Link | 
|   | Cistus L. | 
|   | Citrullus Schrad. ex Eckl. & Zeyh. | 
|   | Clarkia Pursh | 
| Clavija | |
|  | Cleistocactus Lem. | 
| Cleistocana G.D. Rowley | |
| Clematicissus Planch. | |
|   | Clematis L. | 
|   | Cleome L. | 
|   | Cleomella DC. | 
|   | Cleretum N.E.Br | 
|   | Clermontia Gaudich. | 
|   | Clerodendrum L. | 
|   | Cliffortia L. | 
|   | Clinanthus Herb. | 
|   | Clinopodium L. | 
|   | Clintonia Raf. | 
|   | Clitoria L. | 
|   | Clivia Lindl. | 
| Clypeina Michelin | |
|   | Cnidium Cusson ex Juss. | 
|   | Cobaea Cav. | 
|   | Coccoloba P.Browne | 
|   | Cocculus DC. | 
|   | Cochliostema Lem. | 
| Codiaeum Rumph. ex A.Juss. | |
|  | Codonanthe (Mart.) Hanst. | 
|   | Codonanthopsis Mansf. | 
|   | Codonopsis Wall. | 
|   | Coffea L. | 
|   | Coincya Rouy | 
|   | Colchicum L. | 
|   | Coleocephalocereus Backeb. | 
|   | Coleus Lour. | 
|   | Colletia Comm. ex Juss. | 
|   | Colliguaja Molina | 
|   | Collinsia Nutt. | 
|   | Collinsonia L. | 
|   | Collomia Nutt. | 
| Colobocarpos Esser & Welzen | |
|   | Colobogynium Schott | 
|  | Colocasia Schott | 
|   | Columnea L. | 
|   | Colutea L. | 
|   | Comandra Nutt. | 
|   | Comastoma Toyok. | 
|   | Comatricha Preuss | 
|   | Comesperma Labill. | 
|   | Cometes L. | 
|   | Commelina Plum. ex L. | 
| Comospermum Rauschert | |
| Conandrium (K.Schumann) Mez | |
|   | Condea Adans. | 
| Conicosia N.E.Br | |
|   | Conium L. | 
| Connellia N.E.Br. | |
|   | Conocephalum Hill | 
|   | Conopholis Wallr. | 
|   | Conophytum N.E.Br | 
|   | Conospermum Sm. | 
|   | Conradina A.Gray | 
| Consolea Lem. | |
|   | Convallaria L. | 
|   | Convolvulus L. | 
|  | Copiapoa Britton & Rose | 
|   | Coprosma J.R.Forst. & G.Forst. | 
|   | Coptis Salisb. | 
|   | Coptosapelta Korth. | 
| Corallodiscus Batalin | |
|   | Cordia L. | 
|   | Cordyline Comm. ex R.Br. | 
|   | Coreopsis L. | 
| Coris L. | |
|   | Cornus L. | 
|   | Correa Andrews | 
| Corryocactus Britton & Rose | |
|   | Cortia DC. | 
|   | Corydalis DC. | 
|   | Corylopsis Siebold & Zucc. | 
|   | Corylus L. | 
|   | Corynaea Hook.f. | 
| Corynopuntia F.M. Knuth | |
|   | Coryphantha (Engelm.) Lem. | 
|   | Corytoplectus Oerst. | 
| Coscinodon Spreng. | |
| Costantinella Matr. | |
|   | Costus L. | 
|   | Cotoneaster Medik. | 
| Cottendorfia Schult. & Schult.f. in J.J.Roemer & J.A.Schultes | |
|   | Cotula L. | 
|   | Cotyledon Tourn. ex L. | 
|   | Couroupita Aubl. | 
|   | Cousinia Cass. | 
|   | Cracosna Gagnep. | 
|   | Crambe L. | 
|   | Craspedolobium Harms | 
|  | Crassocephalum Moench | 
|   | Crassothonna B.Nord. | 
|   | Crassula L. | 
|   | Crataegus L. | 
| Crawfurdia Wall. | |
|   | Cremanthodium Benth. | 
|   | Crepis L. | 
|  | Crinum L. | 
|   | Crispiloba Steenis | 
|   | Crithmum L. | 
|   | Crocanthemum Spach | 
| Crocidium Hook. | |
| Crocodilium (Boiss. & Heldr.) N.Garcia & Susanna | |
|   | Crocosmia Planch. | 
|   | Crocus L. | 
|   | Crossyne Salisb. | 
|   | Crotalaria L. | 
|   | Croton L. | 
|   | Cryptantha Lehm. ex G.Don | 
| Cryptanthus Otto & A.Dietr. | |
|   | Cryptocoryne Fisch. ex Wydler | 
|   | Cryptogramma R.Br. | 
|   | Cryptomitrium Austin ex Underw. | 
|   | Cryptostephanus Welw. ex Baker | 
| Ctenardisia | |
|   | Ctenium Panz. | 
|   | Cubanola Aiello | 
|  | Cumulopuntia F. Ritter | 
|   | Cuphea P.Browne | 
|   | Cupressus L. | 
| Curculigo Gaertn. | |
|   | Curcuma L. | 
|  | Curio P.V.Heath | 
|   | Cuscuta L. | 
| Cussonia Thunb. | |
|   | Cyananthus Wall. ex Benth. | 
|   | Cyanotis D.Don | 
|   | Cyathea Sm. | 
| Cybianthus Mart. | |
|   | Cycas L. | 
|   | Cyclamen L. | 
| Cylindrophyllum Schwantes | |
|  | Cylindropuntia (Engelm.) F.M. Knuth | 
|   | Cymbalaria Hill | 
|   | Cymopterus Raf. | 
|   | Cynanchica P.Caputo & Del Guacchio | 
|   | Cynara L. | 
|   | Cynoglossum L. | 
|   | Cynoglottis (Gusul.) Vural & Kit Tan | 
|   | Cynomorium L. | 
|   | Cyphanthera Miers | 
| Cyphostemma (Planch.) Alston | |
|   | Cyrtandromoea Zoll. | 
|   | Cyrtanthus Aiton | 
|   | Cyrtophyllum Reinw. ex Blume | 
|   | Cyrtosperma Griff. | 
|   | Cystopteris Bernh. | 
|   | Cytinus L. | 
|   | Dactylanthus Hook.f. | 
|   | Dactylicapnos Wall. | 
|   | Dalea L. | 
|   | Dalechampia Plum. ex L. | 
|   | Damasonium Mill. | 
|   | Damrongia Kerr ex Craib | 
| Danae Medik. | |
|   | Danaea Sm. | 
| Dandya H.E.Moore | |
| Dapania Korth. | |
|   | Daphne Tourn. ex L. | 
|   | Dapsilanthus B.G.Briggs & L.A.S.Johnson | 
| Darlingia F.Muell. | |
|   | Darwinia Rudge | 
| Dasylirion Zucc. | |
|   | Datura L. | 
|   | Daubenya Lindl. | 
|   | Daviesia Sm. | 
|   | Dawsonia R. Br. | 
| Decarya Choux | |
|   | Decaschistia Wight & Arn. | 
| Deherainia | |
| Deinacanthon Mez in A.L.P.P.de Candolle & A.C.P.de Candolle | |
| Delairea Lem. | |
|  | Delosperma N.E.Br | 
|   | Delphinium Tourn. ex L. | 
|   | Dendrocalamus Nees | 
| Dendrocereus Britton & Rose | |
|   | Dendrocnide Miq. | 
|   | Dendroconche Copel. | 
| Dendrolobium (Wight & Arn.) Benth. | |
|   | Dendrolycopodium A.Haines | 
| Dendrophorbium (Cuatrec.) C.Jeffrey | |
|   | Dendrosenecio (Hauman ex Hedberg) B.Nord. | 
|  | Denmoza Britton & Rose | 
|   | Deparia Hook. & Grev. | 
| Deppea Schltdl. & Cham. | |
|   | Dermatobotrys Bolus | 
|   | Desfontainia Ruiz & Pav. | 
|   | Desmidorchis Ehrenb. | 
| Desmodium Desv. | |
| Deuterocohnia Mez in C.F.P.von Martius & auct. suc. (eds.) | |
| Diamena Ravenna | |
| Dianthera L. | |
|   | Dianthus L. | 
| Diastella Salisb. ex Knight | |
|   | Dicentra Bernh. | 
|   | Dicerandra Benth. | 
|   | Dichelostemma Kunth | 
|   | Dichocarpum W.T.Wang & P.K.Hsiao | 
| Dichodon (Bartl. ex Rchb.) Rchb. | |
|   | Dichopogon Kunth | 
|   | Dichorisandra J.C.Mikan | 
|   | Dichoropetalum Fenzl | 
|   | Dicksonia L'Hér. | 
|   | Dicliptera Juss. | 
| Dicrocaulon N.E.Br | |
|   | Dictymia J.Sm. | 
| Didierea Baill. | |
| Didymaotus N.E.Br | |
|   | Didymocarpus Raf. | 
|   | Dieffenbachia Schott | 
|   | Dierama K.Koch | 
|   | Dietes Salisb. ex Klatt | 
|   | Digitalis Tourn. ex L. | 
|   | Dillenia L. | 
| Dilobeia Thouars | |
|   | Dilophia Thomson | 
|   | Dimerocostus Kuntze | 
|   | Dinetus Buch.-Ham. ex D.Don | 
|   | Dinteranthus Schwantes | 
|   | Dionaea J.Ellis | 
|   | Dionysia Fenzl | 
|   | Dioon Lindl. | 
| Diora Ravenna | |
|   | Dioscorea Plum. ex L. | 
|   | Diospyros L. | 
|   | Dipcadi Medik. | 
|   | Diphasiastrum Holub | 
|   | Diphasium C.Presl ex Rothm. | 
|   | Diplacus Nutt. | 
|   | Diplarrena Labill. | 
|   | Diplazium Sw. | 
|   | Diplolepis R.Br. | 
|   | Diplosoma Schwantes | 
|   | Dipsacus L. | 
|   | Dipterostemon Rydb. | 
|   | Dirca L. | 
| Disanthus Maxim. | |
|   | Discaria Hook. | 
|   | Dischidia R.Br. | 
|   | Disciotis Boud. | 
|   | Discocactus Pfeiff. | 
| Discocalyx Mez | |
| Disisorhipsalis Doweld | |
|   | Disocactus Lindl. | 
| Disophyllum | |
|   | Disphyma N.E.Br | 
| Disporopsis Hance | |
|   | Disporum Salisb. | 
| Disteganthus Lem. | |
|   | Disterigma (Klotzsch) Nied. | 
| Distimake Raf. | |
|   | Dittrichia Greuter | 
| Dodecastigma Ducke | |
|   | Doellingeria Nees | 
| Dolichoglottis B.Nord. | |
| Dolichorrhiza (Pojark.) Galushko | |
| Dolomiaea DC. | |
|   | Dombeya Cav. | 
| Dorobaea Cass. | |
|   | Doronicum L. | 
|   | Dorstenia Plum. ex L. | 
|  | Doryanthes Corrêa | 
|   | Downingia Torr. | 
|   | Draba L. | 
|   | Dracaena Vand. | 
|   | Dracocephalum L. | 
|   | Dracontium L. | 
| Dracophilus (Schwantes) Dinter & Schwantes | |
|   | Dracophyllum Labill. | 
|   | Dracunculus Mill. | 
|   | Drimia Jacq. ex Willd. | 
|   | Drimiopsis Lindl. & Paxton | 
|   | Drimys J.R.Forst. & G.Forst. | 
| Drosanthemum Schwantes | |
|   | Drosera L. | 
| Droserapites | |
| Droserapollis | |
| Droseridites | |
|   | Dryas L. | 
|   | Drymocallis Fourr. ex Rydb. | 
|   | Drymonia Mart. | 
| Drymophila R.Br. | |
|   | Dryopteris Adans. | 
| Dryptodon Brid. | |
|  | Dudleya Britton & Rose | 
|   | Duhaldea DC. | 
| Duma T.M.Schust. | |
|   | Dumortiera Nees | 
|   | Dunalia Kunth | 
|   | Dunbaria Wight & Arn. | 
|   | Duperrea Pierre ex Pit. | 
|   | Duvalia Haw. | 
|   | Dyckia Schult. & Schult.f. in J.J.Roemer & J.A.Schultes | 
| Dypsis Noronha ex Mart. | |
|   | Dysolobium Prain | 
|   | Dyssochroma Miers | 
|   | Ebenus L. | 
| Eberlanzia Schwantes | |
| Ebracteola Dinter & Schwantes | |
|   | Echeandia Ortega | 
|  | Echeveria DC. | 
|   | Echidnopsis Hook.f. | 
|   | Echinacea Moench | 
|   | Echinocactus Link & Otto | 
|  | Echinocereus Engelm. | 
|   | Echinodorus Rich. | 
| Echinoferocactus P.V.Heath | |
| Echinomoza G.D.Rowley | |
|   | Echinops L. | 
|  | Echinopsis Zucc. | 
|   | Echium L. | 
|   | Edithcolea N.E.Br. | 
|   | Edmundoa Leme | 
|   | Edraianthus A.DC. | 
| Eduandrea Leme | |
|   | Ehrendorferia Fukuhara & Lidén | 
|   | Eichhornia Kunth | 
| Eidothea A.W.Douglas & B.Hyland | |
| Ekmaniopappus Borhidi | |
|   | Elaeagnus Tourn. ex L. | 
|   | Elaeocarpus Burm. ex L. | 
|   | Elaphoglossum Schott ex J.Sm. | 
|   | Elatostema J.R.Forst. & G.Forst. | 
| Elekmania B.Nord. | |
|   | Eleocharis R.Br. | 
|   | Elephantopus L. | 
| Elingamita G.T.S. Baylis | |
|   | Ellipanthus Hook.f. | 
|   | Elsholtzia Willd. | 
|   | Elytraria Michx. | 
|   | Embelia Burm.f. | 
| Emblemantha B.C.Stone | |
|   | Embothrium J.R.Forst. & G.Forst. | 
|   | Emilia Cass. | 
|   | Eminium Schott | 
|   | Empodium Salisb. | 
| Enarganthe N.E.Br | |
|   | Encephalartos Lehm. | 
| Encholirium Mart. ex Schult. & Schult.f. in J.J.Roemer & J.A.Schultes | |
| Enchylaena R.Br. | |
|   | Endiandra R.Br. | 
| Endoxyla Herrich-Schäffer | |
|   | Enemion Raf. | 
|   | Enerthenema Bowman | 
|   | Engelhardia Lesch. ex Blume | 
|   | Ensete Bruce ex Horan. | 
|   | Eomecon Hance | 
|   | Epigaea L. | 
|   | Epilobium L. | 
|  | Epiphyllum Haw. | 
|   | Epipremnum Schott | 
|   | Episcia Mart. | 
|   | Epithelantha A. Weber ex Britton & Rose | 
| Epixochia G.D.Rowley | |
|   | Equisetum L. | 
|   | Eranthis Salisb. | 
| Erechtites Raf. | |
| Eremocrinum M.E.Jones | |
|   | Eremogone Fenzl | 
|   | Eremophila R.Br. | 
|   | Eremopyrum (Ledeb.) Jaub. & Spach | 
| Eremothera (P.H.Raven) W.L.Wagner & Hoch | |
|   | Eremurus M.Bieb. | 
| Erepsia N.E.Br | |
|   | Eriastrum Wooton & Standl. | 
|   | Erica Tourn. ex L. | 
|   | Ericameria Nutt. | 
|   | Erigeron L. | 
| Eriocapitella Nakai | |
|   | Eriocaulon L. | 
|   | Eriogonum Michx. | 
|   | Eriolarynx (Hunz.) Hunz. | 
|   | Eriophorum L. | 
|   | Eriophyllum Lag. | 
|   | Eriospermum Jacq. | 
|  | Eriosyce Phil. | 
|   | Eritrichium Schrad. ex Gaudin | 
|   | Erodium L'Hér. ex Aiton | 
|   | Eryngium L. | 
|   | Erysimum L. | 
|   | Erythranthe Spach | 
|   | Erythrina L. | 
|   | Erythrochiton Nees & Mart. | 
|   | Erythronium L. | 
|   | Erythrostemon Klotzsch | 
|   | Escallonia Mutis ex L.f. | 
|   | Eschscholzia Cham. | 
|  | Escobaria Britton & Rose | 
| Escontria Rose | |
|   | Espadaea A.Rich. | 
|   | Espeletia Bonpl. | 
|   | Espostoa Britton & Rose | 
| Espostocactus Mottram | |
| Espostoopsis Buxb. | |
| Esterhuysenia L.Bolus | |
|   | Etlingera Giseke | 
|   | Eucalyptus L'Hér. | 
|   | Eucomis L'Hér. | 
|   | Eucrosia Ker Gawl. | 
|   | Eucryphia Cav. | 
| Eulobus Nutt. ex Torr. & A.Gray | |
|  | Eulychnia Phil. | 
|   | Euonymus L. | 
|   | Eupatorium L. | 
|   | Euphorbia L. | 
| Euphrasia L. | |
| Euplassa Salisb. ex Knight | |
|   | Eupodium J.Sm. | 
|   | Euryale Salisb. | 
|   | Eurybia (Cass.) Cass. | 
| Euryops (Cass.) Cass. | |
| Eustoma Salisb. | |
| Eustrephus R.Br. | |
|   | Eutrema R.Br. | 
|   | Eutrochium Raf. | 
|   | Evolvulus L. | 
|   | Exacum L. | 
|   | Exbucklandia R.W.Br. | 
|   | Excoecaria L. | 
|   | Exocarpos Labill. | 
| Exostema (Pers.) Bonpl. | |
|   | Fabiana Ruiz & Pav. | 
| Facheiroa Britton & Rose | |
| Fagopyrum Mill. | |
|   | Fagraea Thunb. | 
|   | Fagus L. | 
|   | Farfugium Lindl. | 
| Fascicularia Mez in C.F.P.von Martius & auct. suc. (eds.) | |
|   | Fatsia Decne. & Planch. | 
|   | Faucaria Schwantes | 
| Faurea Harv. | |
|   | Favratia Feer | 
|   | Felicia Cass. | 
|   | Fenestraria N.E.Br | 
| Fernseea Baker | |
|   | Ferocactus Britton & Rose | 
|   | Ferraria Burm. ex Mill. | 
|   | Ferula Tourn. ex L. | 
|   | Fessia Speta | 
|   | Ficus L | 
|   | Fieldia A.Cunn. | 
| Finschia Warb. | |
| Fischeripollis | |
| Fischerula Mattir. | |
| Fittingia Mez | |
|   | Flemingia Roxb. ex W.T.Aiton | 
| Floydia L.A.S.Johnson & B.G.Briggs | |
|   | Fockea Endl. | 
| Fontainea Heckel | |
|   | Forestiera Poir. | 
| Forzzaea Leme | |
| Fosterella L.B.Sm. | |
|   | Fothergilla L. | 
|   | Fouquieria Kunth | 
|   | Fragaria L. | 
|  | Frailea Britton & Rose | 
|   | Francoa Cav. | 
|   | Franklandia R.Br. | 
|   | Franklinia W.Bartram ex Marshall | 
|   | Frasera Walter | 
| Frithia N.E.Br | |
|   | Fritillaria Tourn. ex L. | 
|   | Fuchsia L. | 
|   | Fumaria Tourn. ex L. | 
|   | Funastrum E.Fourn. | 
| Furcraea Vent. | |
|   | Gagea Salisb. | 
|   | Gagnepainia K.Schum. | 
|   | Gaillardia Foug | 
|   | Galanthus L. | 
|   | Galax Sims | 
|   | Galega L. | 
|   | Galeopsis L. | 
|   | Galinsoga Ruiz & Pav. | 
|   | Galium L. | 
|   | Galtonia Decne. | 
|   | Gamocarpha DC. | 
|   | Garberia A.Gray | 
|   | Garcinia L. | 
| Garnieria Brongn. & Gris | |
| Gastrolobium R.Br. | |
|  | Gaultheria Kalm ex L. | 
|   | Gaylussacia Kunth | 
| Gayophytum A.Juss. | |
| Geissanthus Bentham & Hooker | |
|   | Geissorhiza Ker Gawl. | 
|   | Genlisea A.St.-Hil. | 
|   | Gentiana Tourn. ex L. | 
|   | Gentianella Moench | 
|   | Gentianopsis Ma | 
| Gentlea Lundell | |
|   | Geogenanthus Ule | 
|   | Geohintonia Glass & W.A. Fitz Maur. | 
| Geomitra Becc. | |
|   | Geostachys (Baker) Ridl. | 
|   | Geranium Tourn. ex L. | 
|   | Gerbera L. | 
|   | Gesneria Plum. ex L. | 
|   | Gethyllis L. | 
|   | Geum L. | 
| Gevuina Molina | |
|   | Gibbaeum Haw. ex N.E.Br | 
|   | Gilia Ruiz & Pav. | 
|   | Gillenia Moench | 
|   | Gladiolus Tourn. ex L. | 
|   | Glaucidium Siebold & Zucc. | 
|   | Glaucium Mill. | 
| Glaux Medik. | |
|   | Glebionis Cass. | 
|   | Glehnia F.Schmidt ex Miq. | 
|   | Glischrocaryon Endl. | 
|   | Globba L. | 
|   | Globularia Tourn. ex L. | 
| Glomeropitcairnia Mez | |
|   | Gloriosa L. | 
|  | Glottiphyllum Haw. ex N.E.Br | 
|   | Gloxinia L'Hér. | 
|   | Glumicalyx Hiern | 
|   | Gluta L. | 
|   | Glycosmis Corrêa | 
| Gnaphalium L. | |
|   | Goetzea Wydler | 
|   | Gomphocarpus R.Br. | 
|   | Gompholobium Sm. | 
|   | Gomphostemma Wall. ex Benth. | 
| Gongylocarpus Schltdl. & Cham. | |
|   | Gonialoe (Baker) Boatwr. & J.C.Manning | 
|   | Goniolimon Boiss. | 
|   | Goniophlebium (Blume) C.Presl | 
| Goniothalamus (Blume) Hook.f. & Thomson | |
|   | Gonolobus Michx. | 
| Gonospermum Less. | |
|   | Goodenia Sm. | 
|   | Gordonia Ellis | 
|   | Gorteria L. | 
|  | Gossypium L. | 
|   | Goudaea W.Till & Barfuss | 
| Grahamia Gillies ex Hook. & Arn. | |
|   | Grammitis Sw. | 
| Graphardisia (Mez) Lundell | |
|  | Graptopetalum Rose | 
|  | Graptoveria Gossot | 
| Gratiola L. | |
|   | Grayia Hook. & Arn. | 
|   | Greeneocharis Gürke & Harms | 
|   | Gregbrownia W.Till & Barfuss | 
| Greigia Regel | |
| Grenacheria Mez | |
|   | Grevillea R.Br. ex Knight | 
|   | Grewia L. | 
|   | Griffinia Ker Gawl. | 
|   | Grimmia Hedw. | 
|   | Grona Lour. | 
| Grusonia Rchb. f. ex Britton & Rose | |
|   | Gunnera L. | 
|   | Gunniopsis Pax | 
|   | Gustavia L. | 
|   | Guzmania Ruiz & Pav. | 
|  | Gymnocalycium Pfeiff. ex Mittler | 
| Gymnodiscus Less. | |
|   | Gymnosiphon Blume | 
|   | Gymnosphaera Blume | 
|   | Gymnostachys R.Br. | 
|   | Gymnosteris Greene | 
| Gymnotheca Decne. | |
| Gynoxys Cass. | |
| Gynura Cass. | |
|   | Gypsophila L. | 
|   | Haageocereus Backeb. | 
| Haagespostoa G.D. Rowley | |
| Haastia Hook.f. | |
|   | Haemanthus L. | 
|   | Haematoxylum L. | 
| Hagenbachia Nees & Mart. | |
|   | Hakea Schrad. & J.C.Wendl. | 
|  | Halerpestes Greene | 
|   | Halesia J.Ellis ex L. | 
| Hallianthus H.E.K.Hartmann | |
| Halopeplis Bunge ex Ung.-Sternb. | |
|   | Halophytum Speg. | 
|   | Hamadryas Comm. | 
|   | Hamamelis L. | 
|   | Haplophyllum A.Juss. | 
| Harpagophytum | |
|  | Harrisia Britton | 
| Harrisinopsis G.D.Rowley | |
| Hartmanthus S.A. Hammer | |
| Hasteola Raf. | |
| Hastingsia S.Watson | |
|   | Hatiora Britton & Rose | 
| Hauya DC. | |
|   | Haymondia A.N.Egan & B.Pan bis | 
|   | Hebecarpa (Chodat) J.R.Abbott | 
| Heberdenia Banks ex A.DC. | |
|   | Hechtia Klotzsch | 
|   | Hedera L. | 
|   | Hedychium J.Koenig | 
| Hedyotis L. | |
|   | Hedysarum L. | 
|   | Helenium L. | 
|   | Helianthemum Mill. | 
|   | Helianthus L. | 
|   | Helichrysum Mill. | 
|   | Helicia Lour. | 
| Heliciopsis Sleumer | |
|   | Helicodiceros Schott ex K.Koch | 
|   | Heliconia L. | 
|   | Helicostylis Trécul | 
|   | Helicteres Pluk. ex L. | 
|   | Heliopsis Pers. | 
|   | Helleborus Tourn. ex L. | 
| Hellenia Retz. | |
|   | Helminthostachys Kaulf. | 
|   | Helonias L. | 
|   | Helosis Rich. | 
|   | Helwingia Willd. | 
|   | Hemerocallis L. | 
| Hemionitis L. | |
| Hemiphylacus S.Watson | |
|   | Henckelia Spreng. | 
|   | Hepatica Mill. | 
|   | Herbertia Sweet | 
| Hereroa (Schwantes) Dinter & Schwantes | |
|   | Herrania Goudot | 
| Herreria Ruiz & Pav. | |
| Herreriopsis H.Perrier | |
| Hertia Less. | |
| Hesperaloe Engelm. | |
|   | Hesperantha Ker Gawl. | 
|   | Hesperis L. | 
| Hesperocallis A.Gray | |
|   | Hesperocodon Eddie & Cupido | 
| Hesperoyucca (Engelm.) Trel. | |
| Heteranthemis Schott | |
|   | Heteranthera Ruiz & Pav. | 
|   | Heterocentron Hook. & Arn. | 
|   | Heteropolygonatum M.N.Tamura & Ogisu | 
|   | Heterostemma Wight & Arn. | 
|   | Heterotheca Cass. | 
|   | Hexaphylla (Klokov) P.Caputo & Del Guacchio | 
|   | Hibiscus L. | 
| Hicksbeachia F.Muell. | |
|   | Hieracium L. | 
|   | Hippeastrum Herb. | 
|   | Hippobroma G.Don | 
|   | Hippocrepis L. | 
|   | Hippolytia Poljakov | 
|   | Hippomane L. | 
|   | Hirpicium Cass. | 
|   | Hohenbergia Schult. & Schult.f. in J.J.Roemer & J.A.Schultes | 
| Hohenbergiopsis L.B.Sm. & Read | |
| Hohenmea B.R.Silva & L.F.Sousa | |
| Hollandaea F.Muell. | |
|   | Homalomena Schott | 
| Homogyne Cass. | |
|   | Hoodia Sweet ex Decne. | 
|   | Hoodiapelia G.D.Rowley | 
| Hoplocryptanthus (Mez) Leme | |
|  | Hordeum L. | 
|   | Hornstedtia Retz. | 
|   | Hosta Tratt. | 
|   | Hottarum Bogner & Nicolson | 
|   | Hottonia Boerh. ex L. | 
|   | Houstonia Gronov. | 
|   | Houttuynia Thunb. | 
|   | Hoya R.Br. | 
|   | Huernia R.Br. | 
|   | Hunnemannia Sweet | 
|   | Huperzia Bernh. | 
| Huynhia Greuter | |
|   | Hyacinthella Schur | 
|   | Hyacinthoides Heist. ex Fabr. | 
|   | Hyacinthus Tourn. ex L. | 
|   | Hyalis D.Don ex Hook. & Arn. | 
|   | Hybanthus Jacq. | 
|   | Hydnophytum Jack | 
|   | Hydnora Thunb. | 
|   | Hydrangea Gronov. ex L. | 
|   | Hydrastis J.Ellis | 
|   | Hydrocera Blume | 
|   | Hydrophyllum L. | 
| Hylandia Airy Shaw | |
| Hylocereus (A. Berger) Britton & Rose | |
|   | Hylomecon Maxim. | 
|   | Hylotelephium H.Ohba | 
| Hymenandra A.DC. | |
|   | Hymenasplenium Hayata | 
| Hymenidium Lindl. | |
|   | Hymenocallis Salisb. | 
| Hymenogyne Haw. | |
|   | Hymenolaena DC. | 
|   | Hymenoxys Cass. | 
|   | Hyoscyamus L. | 
|   | Hypecoum Tourn. ex L. | 
|   | Hypericum Tourn. ex L. | 
|  | Hypochaeris L. | 
| Hypoxis L. | |
| Hypseocharis J. Remy | |
|   | Hyptis Jacq. | 
|   | Hysterionica Willd. | 
| Ibatia Decne. | |
|   | Ichtyoselmis Lidén & T.Fukuhara | 
|   | Idahoa A.Nelson & J.F.Macbr. | 
|   | Idiospermum S.T.Blake | 
|   | Ilex Tourn. ex L. | 
|   | Illicium L. | 
| Imaia Trappe & Kovács | |
|  | Impatiens L. | 
|   | Indigofera L. | 
|   | Inula L. | 
| Ioanella Granier & Berthou | |
|   | Iochroma Benth. | 
|   | Ipheion Raf. | 
| Iphigenia Kunth | |
|   | Iphiona Cass. | 
|   | Ipomoea L. | 
|   | Ipomopsis Michx. | 
| Iranecio B.Nord. | |
|   | Iris Tourn. ex L. | 
|   | Ismelia Cass. | 
|   | Isodon (Schrad. ex Benth.) Spach | 
|   | Isoetes L. | 
|   | Isopogon R.Br. ex Knight | 
|   | Isopyrum L. | 
|   | Itatiella G.L. Sm. | 
|   | Itea L. | 
|   | Ixiolirion Fisch. ex Herb. | 
|   | Ixora L. | 
|   | Jaborosa Juss. | 
|   | Jacobaea Cass. | 
| Jacobsenia L.Bolus & Schwantes | |
|   | Jacquemontia Choisy | 
|   | Jacquinia L. | 
| Jagrantia Barfuss & W.Till | |
|   | Jaltomata Schlecht. | 
| Jamesianthus S.F.Blake & Sherff | |
| Jasminocereus Britton & Rose | |
|   | Jasminum L. | 
|   | Jatropha L. | 
|   | Jeffersonia W.Bartram | 
|   | Jensenobotrya A.G.J.Herre | 
| Jepsonia Small | |
| Jessea H.Rob. & Cuatrec. | |
| Jordaaniella H.E.K.Hartmann | |
|   | Jovellana Ruiz & Pav. | 
|   | Juanulloa Ruiz & Pav. | 
|   | Junellia Moldenke | 
| Jungia L.f. | |
|   | Juniperus L. | 
|   | Jurinea Cass. | 
|   | Justicia L. | 
| Juttadinteria Schwantes | |
|   | Kadsura Kaempf. ex Juss. | 
|   | Kaempferia L. | 
|   | Kalanchoe Adans. | 
|   | Kalapuya M.J. Trappe, Trappe & Bonito | 
|   | Kalmia L. | 
|   | Kamettia Kostel. | 
| Karawata J. R. Maciel, G. M. de Sousa, M. das Gracas Lapa Wanderley, G. Zizka, M. Alves | |
|   | Karomia Dop | 
| Kaufmannia Regel | |
|   | Kennedia Vent. | 
| Kermadecia Brongn. & Gris | |
| Keteleeria Carrière | |
| Khadia N.E.Br | |
|   | Kiewia S.Y.Wong & P.C.Boyce | 
|   | Kingia R.Br. | 
| Kitagawia Pimenov | |
| Kleinia Jacq. | |
| Knightia R.Br. | |
|   | Kniphofia Moench | 
| Knorringia (Czukav.) Tzvelev | |
| Knowltonia Salisb. | |
|   | Koenigia L. | 
|   | Kohleria Regel | 
|   | Kokia Lewton | 
|   | Kopsia Blume | 
|   | Kopsiopsis (Beck) Beck | 
|   | Kumara Medik. | 
| Labisia Lindley | |
| Lachanodes DC. | |
|   | Lachenalia J.Jacq. ex Murray | 
|   | Lactuca L. | 
|   | Lagenandra Dalzell | 
|   | Lagerstroemia L. | 
|   | Lagochilus Bunge ex Benth. | 
|   | Lagopsis (Bunge ex Benth.) Bunge | 
|   | Lagotis Gaertn. | 
|   | Lagurus L. | 
| Lambertia Sm. | |
|   | Lamium L. | 
| Lampranthus N.E.Br | |
|   | Lamprocapnos Endl. | 
| Lamprocephalus B.Nord. | |
|   | Lamyropappus Knorring & Tamamsch. | 
|   | Langloisia Greene | 
|   | Langsdorffia Mart. | 
|   | Lantana L. | 
|   | Lapageria Ruiz & Pav. | 
| Lapanthus Louzada & Versieux | |
|  | Lapeirousia Pourr. | 
|   | Lapidaria (Dinter & Schwantes) N.E.Br. | 
|   | Lapiedra Lag. | 
|   | Larix Mill. | 
|   | Larrea Cav. | 
|   | Larryleachia Plowes | 
|   | Laserpitium L. | 
|   | Lasia Lour. | 
|   | Lasimorpha Schott | 
| Lasiocephalus Willd. ex D.F.K.Schltdl. | |
| Lasiocereus F. Ritter | |
| Lasjia P.H.Weston & A.R.Mast | |
|   | Latania Comm. ex Juss. | 
|   | Lateristachys Holub | 
|   | Lathraea L. | 
|   | Lathyrus L. | 
|   | Latua Phil. | 
| Laxmannia R.Br. | |
|   | Lecanopteris Reinw. | 
|  | Ledebouria Roth | 
| Leea D.Royen | |
|   | Leibnitzia Cass. | 
|   | Leiospora (C.A.Mey.) F.Dvořák | 
| Leipoldtia L.Bolus | |
|   | Lellingeria A.R.Sm. & R.C.Moran | 
| Lemeltonia Barfuss & W.Till | |
|   | Lemmaphyllum C.Presl | 
|  | Lemna L. | 
|   | Lennoa Lex. | 
| Leocereus Britton & Rose | |
|   | Leonotis (Pers.) R.Br. | 
|   | Leontice L. | 
|   | Leontopodium Gaertn. | 
|   | Leonurus L. | 
|   | Leopoldia Parl. | 
| Lepidospartum A.Gray | |
|   | Lepidozamia Regel | 
|   | Lepismium Pfeiff. | 
|   | Lepisorus (J.Sm.) Ching | 
| Leptarrhena R.Br. | |
|   | Leptecophylla C.M.Weiller | 
|   | Leptinella Cass. | 
| Leptocereus (A. Berger) Britton & Rose | |
|   | Leptogium (Ach.) Gray | 
|   | Leptopetalum Hook. & Arn. | 
| Leptopyrum Raf. | |
|   | Leptosiphon Benth. | 
|   | Leschenaultia R.Br. | 
|   | Lespedeza Michx. | 
|   | Leucadendron R.Br. | 
| Leucangium Cooke & Massee | |
|   | Leucas R.Br. | 
|   | Leucheria Lag. | 
|   | Leuchtenbergia Hook. | 
|   | Leucocasia Schott | 
|   | Leucocera Turcz. | 
|   | Leucochrysum (DC.) Paul G.Wilson | 
|   | Leucocoryne Lindl. | 
|   | Leucocrinum Nutt. ex A.Gray | 
|   | Leucojum L. | 
|   | Leucophyllum Bonpl. | 
|   | Leucophysalis Rydb. | 
|   | Leucospermum R.Br. | 
|   | Leucothoe D.Don | 
|  | Leuenbergeria Lodé | 
| Leuzea DC. | |
|   | Leycesteria Wall. | 
|   | Leymus Hochst. | 
|   | Leysera L. | 
|   | Liatris Gaertn. ex Schreb. | 
|   | Libertia Spreng. | 
|   | Ligularia Cass. | 
| Ligulariopsis Y.L.Chen | |
| Ligusticopsis Leute | |
|   | Ligusticum L. | 
|   | Lilaeopsis Greene | 
|   | Lilium Tourn. ex L. | 
|   | Limonium Mill. | 
|   | Linanthus Benth. | 
|   | Linaria Mill. | 
|   | Lindelofia Lehm. | 
|   | Lindernia All. | 
| Lindmania Mez in A.L.P.P.de Candolle & A.C.P.de Candolle | |
|   | Linum L. | 
|   | Liriodendron L. | 
| Liriope Lour. | |
|   | Lisaea Boiss. | 
|   | Lithocarpus Blume | 
|   | Lithophragma (Nutt.) Torr. & A.Gray | 
|   | Lithops N.E.Br | 
|   | Lithospermum L. | 
|   | Litsea Lam. | 
|   | Loasa Adans. | 
|   | Lobelia Plum. ex L. | 
|   | Lodoicea Comm. ex DC. | 
|   | Loeselia L. | 
|   | Loeseliastrum (Brand) Timbrook | 
| Loheria Merrill | |
|   | Lomandra Labill. | 
|   | Lomatia R.Br. | 
|   | Lomatium Raf. | 
|   | Lomelosia Raf. | 
|   | Lonicera L. | 
| Lopezia Cav. | |
| Lophiola Ker Gawl. | |
| Lopholaena DC. | |
|   | Lophopetalum Wight ex Arn. | 
|   | Lophophora J.M. Coult. | 
|   | Lophophytum Schott & Endl. | 
|   | Loropetalum R.Br. | 
|   | Lotus L. | 
|   | Luculia Sweet | 
|   | Ludwigia L. | 
| Luina Benth. | |
|   | Lunaria Tourn. ex L. | 
|   | Lupinus L. | 
| Lutheria Barfuss & W.Till | |
|   | Luzula DC. | 
|   | Luzuriaga Ruiz & Pav. | 
|   | Lycium L. | 
|   | Lycopodiella Holub | 
| Lycopodioides Kuntze | |
|   | Lycopodium L. | 
|   | Lycoris Herb. | 
|   | Lycoseris Cass. | 
|   | Lygodium Sw. | 
| Lymania Read | |
|   | Lyonia Nutt. | 
|   | Lysichiton Schott | 
|   | Lysimachia Tourn. ex L. | 
|   | Lythrum L. | 
| Macadamia F.Muell. | |
|   | Macbridea Elliott ex Nutt. | 
| Machairophyllum Schwantes | |
|   | Mackaya Harv. | 
|   | Mackinlaya F.Muell. | 
|   | Macleaya R.Br. | 
|   | Maclura Nutt. | 
|   | Macrocarpaea (Griseb.) Gilg | 
|   | Macrozamia Miq. | 
| Maerua Forssk. | |
|   | Maesa Forssk. | 
|   | Magnolia Plum. ex L. | 
|   | Maianthemum F.H.Wigg. | 
| Maierocactus E.C.Rost | |
|  | Maihuenia (Phil. ex F.A.C. Weber) K. Schum. | 
|  | Maihueniopsis Speg. | 
| Maireana Moq. | |
|   | Malachra L. | 
| Malagasia L.A.S.Johnson & B.G.Briggs | |
|   | Malephora N.E.Br | 
| Malotigena Niederle | |
|   | Malva Tourn. ex L. | 
|  | Mammillaria Haw. | 
|  | Mandragora L. | 
| Manekia Trel. | |
| Mangenotiella M.Schmid | |
|   | Manihot Mill. | 
| Mankyua B.Y.Sun, M.H.Kim & C.H.Kim | |
|   | Mannia Corda | 
|   | Mapania Aubl. | 
| Marattia Sw. | |
|   | Marcgravia Lour. | 
|   | Marchantia L. | 
|   | Marlothistella Schwantes | 
|   | Marrubium L. | 
|   | Marsdenia R.Br. | 
|   | Marshallia Schreb. | 
|   | Martellidendron (Martelli) Callm. & Chassot | 
|   | Massonia Thunb. ex Houtt. | 
| Mastixiodendron Melch. | |
|   | Matelea Aubl. | 
|   | Mathiasella Constance & C.L.Hitchc. | 
|   | Matonia R.Br. ex Wall. | 
|   | Matthiola W.T.Aiton | 
| Mattiastrum Brand | |
|  | Matucana Britton & Rose | 
|   | Mayaca Aubl. | 
|   | Maytenus (Speg.) Lourteig, O'Donell & Sleumer | 
|   | Meconopsis Vig. | 
|   | Medeola Gronov. ex L. | 
|   | Medicago L. | 
|   | Medinilla Gaudich. | 
| Megacorax Elizondo et al. | |
| Megahertzia A.S.George & B.Hyland | |
| Megaleranthis Ohwi | |
|   | Melaleuca Mant. | 
|   | Melampyrum L. | 
|   | Melanocalyx (Fed.) Morin | 
| Melanortocarya Selvi, Bigazzi, Hilger & Papini | |
|   | Melastoma L. | 
|   | Melittis L. | 
|   | Melocactus (L.) Link & Otto | 
|   | Melpomene A.R.Sm. & R.C.Moran | 
|   | Memecylon L. | 
| Mendoncia Vell. ex Vand. | |
|   | Menodora Humb. and Bonpl. | 
|   | Mentzelia Plum. ex L. | 
|  | Menyanthes L. | 
|   | Meriania Sw. | 
|   | Merremia Dennst. ex Endl. | 
|   | Mertensia Roth | 
| Merwilla Speta | |
|   | Mesembryanthemum L. | 
|   | Mesosphaerum P.Browne | 
| Mestoklema N.E.Br. ex Glen | |
| Metanemone W.T.Wang | |
|   | Metrosideros Banks ex Gaertn. | 
| Meyerophytum Schwantes | |
|   | Michauxia L'Hér. | 
|   | Miconia Ruiz & Pav. | 
|  | Micranthes Haw. | 
|   | Micranthocereus Backeb. | 
|   | Microchirita (C.B.Clarke) Yin Z.Wang | 
| Microconomorpha (Mez) Lundell | |
|   | Microcycas (Miq.) A.DC. | 
|   | Microgramma C.Presl | 
|   | Micromeria Benth. | 
| Micropleura Lag. | |
|   | Microsorum Link | 
|   | Microsteris Greene | 
|   | Microtropis E.Mey. | 
|   | Mikania Willd. | 
| Mikaniopsis Milne-Redh. | |
| Mila Britton & Rose | |
|   | Milla Cav. | 
|   | Millettia Wight & Arn. | 
|   | Milligania Hook.f. | 
|   | Mimetes Salisb. | 
|   | Mimosa L. | 
|   | Mimulus L. | 
|  | Miqueliopuntia F. Ritter | 
| Mirabella F. Ritter | |
|   | Misodendrum Banks ex DC. | 
|   | Mitchella L. | 
|   | Mitella L. | 
|   | Mitragyna Korth. | 
|   | Mitrasacme Labill. | 
| Mitrastemon Makino | |
|   | Mitreola L. | 
|   | Mitrephora Hook.f. & Thomson | 
| Mitrophyllum Schwantes | |
|   | Mohavea A.Gray | 
|   | Moltkia Lehm. | 
|   | Monanthes Haw. | 
|   | Monarda L. | 
|   | Moneses Salisb. ex Gray | 
|   | Monilaria (Schwantes) Schwantes | 
|   | Monnina Ruiz & Pav. | 
| Monochoria C. Presl | |
|   | Monocostus K.Schum. | 
|   | Monolluma Plowes | 
| Monoon Miq. | |
| Monoporus A.DC. | |
|   | Monotropa L. | 
|   | Monotropsis Schwein. ex Elliott | 
| Monsonia L. | |
|   | Monstera Adans. | 
|   | Montiopsis Kuntze | 
|   | Monttea Gay | 
|   | Mora Schomb. ex Benth. | 
|  | Moraea Mill. | 
|   | Morchella Dill. ex Pers. | 
|   | Moricandia DC. | 
|   | Morina L. | 
|   | Moschopsis Phil. | 
| Mossia N.E.Br | |
| Muehlbergella Feer | |
| Muehlenbeckia Meisn. | |
| Muilla S.Watson ex Benth. | |
| Muiria N.E.Br | |
| Mulguraea N.O'Leary & P.Peralta | |
|   | Mundulea Benth. | 
|   | Muraltia Neck. | 
|   | Murdannia Royle | 
|  | Murraya J.Koenig ex L. | 
|   | Musa L. | 
|   | Muscari Mill. | 
| Muscarimia Kostel. ex Losinsk. | |
|   | Musella (Franch.) C.Y.Wu ex H.W.Li | 
| Musgravea F.Muell. | |
|   | Musineon Raf. | 
| Mutellina Wolf | |
|   | Mutisia L.f. | 
|   | Myoschilos Ruiz & Pav. | 
|   | Myosotidium Hook. | 
|   | Myosotis L. | 
|   | Myricaria Desv. | 
|   | Myrmecodia Jack | 
| Myrsine L. | |
| Myrtgerocactus Moran | |
|   | Myrtillocactus Console | 
|   | Mystropetalon Harv. | 
| Mytilaria Lecomte | |
|   | Nabalu S.Y.Wong & P.C.Boyce | 
|  | Nabalus Cass. | 
| Namaquanthus L.Bolus | |
| Namibia (Schwantes) Schwantes | |
| Nananthus N.E.Br | |
| Nanuza L.B.Sm. & Ayensu | |
|   | Napoleonaea P.Beauv. | 
|   | Narcissus L. | 
|   | Narthecium Huds. | 
|   | Nasa Weigend | 
|   | Nassauvia Comm. ex Juss. | 
|  | Nastanthus Meyen | 
|   | Nauclea L. | 
|   | Navarretia Ruiz & Pav. | 
| Navia Schult. & Schult.f. in J.J.Roemer & J.A.Schultes | |
| Neja D.Don | |
| Nekemias Raf. | |
|  | Nelia Schwantes | 
| Nelsonia R.Br. | |
|   | Nemacladus Nutt. | 
|   | Nemastylis Nutt. | 
|  | Nematanthus Schrad. | 
|   | Nemophila Nutt. ex Barton | 
| Nemosenecio (Kitam.) B.Nord. | |
|   | Neoastelia J.B.Williams | 
| Neobuxbaumia Backeb. | |
|   | Neocheiropteris Christ | 
|   | Neogaya Meisn. | 
| Neoglaziovia Mez in C.F.P.von Martius & auct. suc. (eds.) | |
| Neohenricia L.Bolus | |
|   | Neohodgsonia Perss. | 
|   | Neoholmgrenia W.L.Wagner & Hoch | 
|   | Neolepisorus Ching | 
|   | Neolloydia Britton & Rose | 
| Neomezia Votsch | |
|   | Neoparrya Mathias | 
| Neoraimondia Britton & Rose | |
|   | Neoregelia L.B.Sm. | 
| Neorites L.S.Sm. | |
|   | Neowerdermannia Fric | 
|  | Nepenthes L. | 
|   | Nepeta L. | 
|   | Nephelium L. | 
|   | Nerine Herb. | 
|   | Nerium L. | 
|   | Nesocodon Thulin | 
| Neuropeltis Wall. | |
|   | Neustanthus Benth. | 
|   | Nicandra Adans. | 
|   | Nicotiana L. | 
|   | Nidularium Lem. | 
| Niduregelia Leme | |
|   | Nierembergia Nierembergia Ruiz & Pav. | 
|   | Nigella L. | 
|   | Niphidium J.Sm. | 
|   | Nivenia Vent. | 
|   | Noccaea Moench | 
|   | Nolana L. | 
| Nolina Michx. | |
|   | Nonea Medik. | 
|   | Nopalea Salm-Dyck | 
|   | Notholirion Wall. ex Boiss. | 
| Nothorites P.H.Weston & A.R.Mast | |
| Nothotsuga H.H.Hu ex C.N.Page | |
|   | Notobubon B.-E.van Wyk | 
| Notocacteae Speg. | |
|   | Nototriche Turcz. | 
|   | Nuphar Sm. | 
|   | Nuytsia R.Br. ex G.Don | 
|   | Nymphaea L. | 
|   | Nymphoides Ség. | 
|   | Nypa Steck | 
|   | Obolaria L. | 
|   | Obregonia Fric | 
|   | Ochagavia Phil. | 
|   | Ochetophila Poepp. ex Reissek | 
|   | Ochroma Sw. | 
| Octopoma N.E.Br | |
|   | Odontonema Nees | 
|   | Oenanthe L. | 
|   | Oenothera L. | 
|   | Olearia Moench | 
|   | Olgaea Iljin | 
| Oligothrix DC. | |
|   | Olsynium Raf. | 
| Omphalogramma Franch. | |
| Oncostemum A. de Jussieu | |
|   | Onobrychis Mill. | 
|   | Onopordum L. | 
|   | Onoseris Willd. | 
|   | Onosma L. | 
|   | Ooia S.Y.Wong & P.C.Boyce | 
|   | Oophytum N.E.Br. | 
|   | Operculicarya H.Perrier | 
|   | Operculina Silva Manso | 
| Ophellantha Standl. | |
|   | Ophioglossum L. | 
| Ophiopogon Ker Gawl. | |
| Opisthiolepis L.S.Sm. | |
|  | Opuntia Mill. | 
|   | Orbea Haw. | 
| Orbeanthus L.C.Leach | |
|   | Orchidantha N.E.Br. | 
|   | Oreocallis R.Br. | 
|   | Oreocarya Greene | 
|   | Oreocereus (A. Berger) Riccob. | 
|   | Oreocharis Benth. | 
|   | Oreonana Jeps. | 
|   | Oreopanax Decne. & Planch. | 
|   | Oreopolus Schltdl. | 
| Oresbia Cron & B.Nord. | |
|   | Origanum L. | 
| Orites R.Br. | |
|   | Ornithoboea Parish ex C.B.Clarke | 
|   | Ornithogalum L. | 
|   | Ornithoglossum Salisb. | 
|  | Orobanche L. | 
|   | Orontium L. | 
| Orothamnus Pappe ex Hook. | |
|   | Oroya Britton & Rose | 
|   | Ortegocactus Alexander | 
|   | Orthilia Raf. | 
| Orthophytum Beer | |
| Orthopterum L.Bolus | |
|   | Orthosiphon Benth. | 
|   | Osbeckia L. | 
| Oscularia Schwantes | |
|   | Osmoxylon Miq. | 
|   | Osmunda L. | 
| Ostodes Blume | |
|   | Ostrowskia Regel | 
|   | Osyris L. | 
|   | Othonna L. | 
|   | Ototropis Nees | 
| Ottosonderia L.Bolus | |
|   | Oxalis L. | 
| Oxygonum Burch. ex Campd. | |
| Oxygraphis Bunge | |
|   | Oxypetalum R.Br. | 
| Oxyria Hill | |
|   | Oxystelma R.Br. | 
|   | Oxytropis DC. | 
| Oziroe Raf. | |
| Pacherocactus G.D. Rowley | |
|   | Pachycentria Blume | 
| Pachycereus (A. Berger) Britton & Rose | |
|   | Pachylaena D.Don ex Hook. & Arn. | 
|  | Pachyphytum Link. | 
|   | Pachypodium Lindl. | 
|   | Pachystachys Nees | 
|   | Packera Á.Löve & D.Löve | 
|   | Paederota L. | 
|   | Paeonia L. | 
|   | Paepalanthus Mart. | 
| Palaeoaldrovanda | |
|   | Palafoxia Lag. | 
|   | Palhinhaea Franco & Vasc. | 
|   | Palicourea Aubl. | 
|  | Palisota Rchb. ex Endl. | 
|   | Palustricodon Morin | 
|   | Pamianthe Stapf | 
|   | Panax L. | 
|   | Pancratium Dill. ex L. | 
|   | Pandanus Parkinson | 
| Panopsis Salisb. ex Knight | |
| Pantadenia Gagnep. | |
| Panzerina Soják | |
|   | Papaver L. | 
| Paracalia Cuatrec. | |
|   | Paracaryum Boiss. | 
|   | Paracostus C.D.Specht | 
|   | Paradiacheopsis R.J.G.Hertel | 
|   | Paradisea Mazzuc. | 
|   | Paradrymonia Hanst. | 
|   | Paramongaia Velarde | 
| Paranomus Salisb. | |
|   | Paraquilegia J.R.Drumm. & Hutch. | 
| Parasenecio W.W.Sm. & J.Small | |
|   | Parasopubia H.-P.Hofm. & Eb.Fisch. | 
| Parathesis J.D.Hooker f. | |
|   | Paris L. | 
|   | Parkinsonia Plum. ex L. | 
|   | Parnassia L. | 
|   | Parochetus Buch.-Ham. ex D.Don | 
|  | Parodia Speg. | 
|   | Paronychia Mill. | 
| Paroxygraphis W.W.Sm. | |
|   | Parrya R.Br. | 
|   | Parthenium L. | 
| Parthenocissus Planch. | |
| Parvocaulis S.Berger, U.Fettweiss, S.Gleissberg | |
|   | Passiflora L. | 
|   | Patrinia Juss. | 
|   | Paulownia Siebold & Zucc. | 
| Pauridia Harv. | |
| Pausandra Radlk. | |
|   | Pavetta L. | 
|   | Pearcea Regel | 
|   | Pecluma M.G.Price | 
| Pedalium | |
| Pedicellarum M.Hotta | |
|   | Pedicularis L. | 
|   | Pediocactus Britton & Rose | 
|  | Pediomelum Rydb. | 
|   | Pelargonium L'Hér. ex Aiton | 
|  | Pelecyphora Ehrenb. | 
| Peliosanthes Andrews | |
|  | Peniocereus (A. Berger) Britton & Rose | 
|   | Penstemon Schmidel | 
|   | Pentaglottis Tausch | 
|   | Pentanema Cass. | 
| Pentapeltis Bunge | |
|   | Pentatropis R.Br. ex Wight & Arn. | 
|   | Peperomia Ruiz & Pavon | 
|   | Pereskia Mill. | 
| Pereskiopsis Britton & Rose | |
|  | Perezia Lag. | 
| Pericallis D.Don | |
|   | Periploca Tourn. ex L. | 
|   | Persicaria (L.) Mill. | 
| Persoonia Sm. | |
|   | Pertya Sch.Bip. | 
|   | Petasites Mill. | 
|   | Petiveria Plum. ex L. | 
|   | Petrocallis W.T.Aiton | 
|   | Petrocosmea Oliv. | 
| Petronymphe H.E.Moore | |
|   | Petrophile R.Br. ex Knight | 
|   | Petrosedum Grulich | 
|   | Petunia Juss. | 
|   | Peucedanum L. | 
| Pfeiffera Salm-Dyck | |
|   | Phacelia Juss. | 
|   | Phaedranassa Herb. | 
|   | Phagnalon Cass. | 
|   | Phanera Lour. | 
| Phaneroglossa B.Nord. | |
|   | Phaulothamnus A.Gray | 
|  | Phedimus Raf. | 
|   | Phelline Labill. | 
|   | Phemeranthus Raf. | 
| Phenakospermum Endl. | |
|   | Philesia Comm. ex Juss. | 
|   | Philodendron Schott | 
|   | Phlebodium (R.Br.) J.Sm. | 
|   | Phlegmariurus (Herter) Holub | 
|   | Phlogacanthus Nees | 
|   | Phlomis L. | 
|   | Phlomoides Moench | 
|   | Phlox L. | 
|   | Pholisma Nutt. ex Hook. | 
|   | Phormium J.R.Forst. & G.Forst. | 
| Phtheirospermum Bunge | |
|   | Phycella Lindl. | 
|   | Phygelius E. Mey. ex Benth. | 
|   | Phyllagathis Blume | 
|   | Phyllanthus L. | 
|   | Phyllocyclus Kurz | 
|   | Phyllodoce Salisb. | 
|   | Phylloglossum Kunze | 
|   | Physalis L. | 
|   | Physocarpus Physocarpus (Cambess.) Raf. | 
|   | Physochlaina G.Don | 
|   | Physoplexis Schur | 
|   | Physostegia Benth. | 
|   | Phyteuma L. | 
|   | Phytolacca Tourn. ex L. | 
|   | Piaranthus R.Br. | 
| Picea A.Dietr. | |
|   | Picnomon Adans. | 
|   | Pieris D.Don | 
|   | Pierrebraunia Esteves | 
|   | Pilea Lindl. | 
|   | Piliostigma Hochst. | 
|   | Pilosella Hill | 
|   | Pilosocereus Byles & G.D. Rowley | 
|   | Pilostyles Guill. | 
|   | Pinckneya Michx. | 
|   | Pinellia Ten. | 
|   | Pinguicula L. | 
|   | Pinnasa Weigend & R.H.Acuña | 
| Pinus L. | |
| Piper L. | |
|   | Piptospatha N.E.Br. | 
|   | Pistacia L. | 
|   | Pitcairnia L'Hér. | 
|   | Pithecellobium Mart. | 
| Pittocaulon H.Rob. & Brettell | |
|   | Pittosporum Banks ex Gaertn. | 
|   | Placospermum C.T.White & W.D.Francis | 
| Pladaroxylon Hook.f. | |
|   | Plagiobothrys Fisch. & C.A.Mey. | 
|  | Plantago L. | 
|   | Platostoma P.Beauv. | 
|   | Platycerium Desv. | 
| Platycodon A.DC. | |
|   | Platysace Bunge | 
| Platyspermation Guillaumin | |
|   | Platystemon Benth. | 
| Plectranthus L'Hér. | |
| Pleiomeris A.DC. | |
|  | Pleiospilos N.E.Br | 
|   | Pleopeltis Humb. & Bonpl. ex Willd. | 
|   | Pleroma D.Don | 
|   | Pleurolobus J.St.-Hil. | 
|   | Pleurophyllum Hook.f. | 
|   | Plinia Plum. ex L. | 
|   | Plocama Aiton | 
|   | Plumbago Tourn. ex L. | 
|   | Plutarchia A.C.Sm. | 
|   | Podistera S.Watson | 
|   | Podolasia N.E.Br. | 
|   | Podonosma Boiss. | 
|   | Podophyllum Linnaeus | 
|   | Pogostemon Desf. | 
| Pojarkovia Askerova | |
| Polaskia Backeb. | |
|   | Polemonium L. | 
|   | Polhillides H. Ohashi & K.Ohashi | 
|   | Pollia Thunb. | 
|   | Polyachyrus Lag. | 
|   | Polygala L. | 
|   | Polygaloides Agosti | 
|   | Polygonatum Mill. | 
|   | Polygonum L. | 
|   | Polypodium L. | 
|   | Polyspora Sweet | 
|   | Polystichum Roth | 
|   | Polytaenia DC. | 
| Polytrichastrum G.L. Sm. | |
|   | Polytrichum Hedw. | 
| Pomatosace | |
| Pongamia Adans. | |
|   | Pontederia L. | 
| Portea Brongn. ex K.Koch | |
|   | Portulaca L. | 
|   | Portulacaria Jacq. | 
|   | Potentilla L. | 
|   | Pothoidium Schott | 
|  | Pothos L. | 
|   | Pozoa Lag. | 
|   | Praecereus Buxb. | 
|   | Prestonia R.Br. | 
|   | Primula L. | 
|   | Prionotes R.Br. | 
|   | Prismatomeris Thwaites | 
| Procris Comm. ex Juss. | |
|   | Proiphys Herb. | 
|   | Prometheum (A.Berger) H.Ohba | 
|   | Prosartes D.Don | 
|   | Prosopis L. | 
|   | Prospero Salisb. | 
|   | Prostanthera Labill. | 
|   | Protea L. | 
|   | Protocodon Morin | 
|   | Proustia Lag. | 
|   | Prunella L. | 
|   | Prunus L. | 
| Psacalium Cass. | |
|   | Psammisia Klotzsch | 
|   | Psammomoya Diels & Loes. | 
| Psammophora Dinter & Schwantes | |
|   | Psammosilene W.C.Wu & C.Y.Wu | 
| Psephellus Cass. | |
| Pseudalcantarea (C.Presl) Pinzón & Barfuss | |
| Pseudoacanthocereus F. Ritter | |
| Pseudocalyx Radlk. | |
| Pseudoclypeina Radoi?i? | |
| Pseudodictamnus Fabr. | |
| Pseudogaltonia (Kuntze) Engl. | |
| Pseudognaphalium Kirp. | |
| Pseudogynoxys (Greenm.) Cabrera | |
| Pseudolarix Gordon & Glend. | |
|   | Pseudolithos P.R.O.Bally | 
|   | Pseudolycopodiella Holub | 
|   | Pseudolycopodium Holub | 
|   | Pseudomuscari Garbari & Greuter | 
| Pseudopodospermum (Lipsch. & Krasch.) Kuth. | |
| Pseudoprospero Speta | |
| Pseudorhipsalis Britton & Rose | |
|   | Pseudosedum A.Berger | 
|   | Pseudotrillium S.B.Farmer | 
| Pseudotsuga Carrière | |
|   | Pseudoturritis Al-Shehbaz | 
|   | Psoralea L. | 
|   | Psorothamnus Rydb. | 
|   | Psychotria L. | 
| Psychrophyton Beauverd | |
|   | Psylliostachys (Jaub. & Spach) Nevski | 
|   | Ptelea L. | 
|   | Pteridophyllum Siebold & Zucc. | 
| Pterisanthes Blume | |
|  | Pterocactus K. Schum. | 
|   | Pterocephalus Vaill. ex Adans. | 
| Pteropyrum Jaub. & Spach | |
|   | Pterospora Nutt. | 
|   | Pterostyrax Siebold & Zucc. | 
| Pteroxygonum Dammer & Diels | |
|   | Pterygiella Oliv. | 
|   | Ptilimnium Raf. | 
|   | Ptilotus R.Br. | 
|   | Ptisana Murdock | 
|   | Pueraria DC. | 
|   | Pulsatilla Mill. | 
|   | Punica L. | 
| Purshia DC. ex Poir. | |
|   | Puschkinia Adams | 
|   | Puya Molina | 
|   | Pycnanthemum Michx. | 
| Pycnospatha Thorel ex Gagnep. | |
| Pygmaeocereus H. Johnson & Backeb. | |
|   | Pyracantha M.Roem. | 
|   | Pyrola L. | 
|   | Pyrrosia Mirb. | 
|   | Quercus L. | 
|   | Quesnelia Gaudich. | 
| Quiabentia Britton & Rose | |
|   | Quinchamalium Molina | 
|   | Quincula Raf. | 
| Rabiea N.E.Br | |
|   | Racinaea M.A.Spencer & L.B.Sm. | 
|  | Racomitrium Brid. | 
| Radermachera Zoll. & Moritzi | |
|   | Rafflesia R.Br. ex Thomson bis | 
| Rainiera Greene | |
|   | Ramonda Rich. | 
|   | Ranunculus L. | 
|   | Raoulia Hook.f. ex Raoul | 
|   | Raphionacme Harv. | 
|   | Ratibida Raf. | 
| Rauhia Traub | |
| Rauhocereus Backeb. | |
| Ravenala Adans. | |
|   | Reaumuria L. | 
|   | Reboulia Raddi | 
|  | Rebutia K. Schum. | 
| Reineckea Kunth | |
|   | Remusatia Schott | 
|   | Reseda Tourn. ex L. | 
|   | Reynoutria Houtt. | 
|   | Rhabdothamnus A.Cunn. | 
|   | Rhaphidophora Hassk. | 
|   | Rhaphiolepis Lindl. | 
|   | Rhaponticum Ludwig | 
|   | Rheum L. | 
|   | Rhexia Gronov. | 
|   | Rhinanthus L. | 
| Rhinephyllum N.E.Br | |
| Rhinotropis (S.F.Blake) J.R.Abbott | |
|   | Rhipsalis Gaertn. | 
| Rhipsaphyllopsis Werderm. | |
| Rhizanthes Dumort. | |
|   | Rhizobotrya Tausch | 
|   | Rhodiola L. | 
|   | Rhododendron L. | 
|   | Rhodoleia Champ. ex Hook. | 
|   | Rhodolirium Phil. | 
| Rhodospatha Poepp. | |
|   | Rhodothamnus Rchb. | 
| Rhoicissus Planch. | |
| Rhombophyllum (Schwantes) Schwantes | |
|   | Rhopalocnemis Jungh. | 
|   | Rhus L. | 
|   | Rhynchocorys Griseb. | 
|   | Rhynchoglossum Blume | 
|   | Rhynchosia Lour. | 
|   | Rhynchospora Vahl | 
|   | Rhytidocaulon P.R.O.Bally | 
|   | Rhytidophyllum Mart. | 
|   | Riccia L. | 
|   | Richteria Kar. & Kir. | 
|   | Ridleyandra A.Weber & B.L.Burtt | 
| Ripariosida Weakley & D.B.Poind. | |
|   | Rivina Plum. ex L. | 
|   | Roemeria Medik. | 
| Rohdea Roth | |
|   | Rojasianthe Standl. & Steyerm. | 
| Rokautskyia Leme | |
| Roldana La Llave | |
| Romnalda P.F.Stevens | |
|   | Romneya Harv. | 
|   | Romulea Maratti | 
| Ronnbergia É.Morren & André | |
|   | Rosa L. | 
|   | Roscoea Sm. | 
|   | Rosularia (DC.) Stapf | 
|   | Rotala L. | 
|   | Rotheca Raf. | 
|   | Rothmannia Thunb. | 
| Roupala Aubl. | |
| Roycea C.A.Gardner | |
|   | Roystonea O.F.Cook | 
|   | Rubia L. | 
|   | Rubus L. | 
|   | Rudbeckia L. | 
|   | Ruellia Plum. ex L. | 
| Rugelia Shuttlew. ex Chapm. | |
|   | Rumex L. | 
|   | Ruschia Schwantes | 
| Ruschianthus L.Bolus | |
|   | Ruscus L. | 
|   | Russelia Jacq. | 
|   | Ruta L. | 
|   | Sabatia Adans. | 
| Sadiria Mez | |
|   | Sagina L. | 
|   | Sagittaria Ruppius ex L. | 
| Sagotia Baill. | |
| Saintpauliopsis Staner | |
|   | Salacia L. | 
|   | Salicornia L. | 
|   | Salpichroa Miers | 
|   | Salpiglossis Ruiz & Pav. | 
|   | Saltugilia (V.E.Grant & A.D.Grant) L.A.Johnson | 
|   | Salvia L. | 
| Samaipaticereus Cárdenas | |
|   | Sambucus L. | 
| Samolus L. | |
| Sanango G.S.Bunting & Duke | |
|   | Sanchezia Ruiz & Pav. | 
|   | Sandersonia Hook. | 
|   | Sanguinaria Dill. ex L. | 
|   | Sanguisorba L. | 
|   | Sanicula L. | 
| Saniculiphyllum C.Y.Wu & T.C.Ku | |
| Saphesia N.E.Br | |
|   | Saponaria L. | 
|   | Sapria Griff. | 
|   | Saraca L. | 
|   | Sarcocapnos DC. | 
|   | Sarcocaulon Sweet | 
|   | Sarcodes Torr. | 
|   | Sarcolobus R.Br. | 
|   | Sarcophyte Sparrm. | 
|   | Sarcopyramis Wall. | 
| Sarcotheca Blume | |
|   | Satyria Klotzsch | 
|   | Sauromatum Schott | 
|   | Saururus L. | 
|   | Saussurea DC. | 
|   | Sauvagesia L. | 
|   | Saxifraga Tourn. ex L. | 
| Saxonipollis | |
|   | Scabiosa L. | 
|   | Scadoxus Raf. | 
|   | Scaevola L. | 
|   | Scandix L. | 
|   | Scheuchzeria L. | 
|   | Schinus L. | 
|   | Schisandra Michx. | 
|   | Schismatoglottis Zoll. & Moritzi | 
|   | Schizaea Sm. | 
|   | Schizanthus Ruiz & Pav. | 
| Schizocarphus van der Merwe | |
|   | Schizocodon Siebold & Zucc. | 
| Schlechteranthus Schwantes | |
|   | Schlumbergera Lem. | 
|   | Schoenia Steetz | 
| Schoenocaulon A.Gray | |
| Schoenolaena Bunge | |
| Schoenolirion Durand | |
|   | Schraderanthus Averett | 
|   | Schrenkia Fisch. & C.A.Mey. | 
|  | Schwalbea L. | 
|   | Scilla L. | 
|   | Scindapsus Schott | 
|  | Sclerocactus Britton & Rose | 
|   | Scleromitrion (Wight & Arn.) Meisn. | 
|   | Scoliopus Torr. | 
| Scopelogena L.Bolus | |
|   | Scopolia Jacq. | 
|   | Scorzonera L. | 
|   | Scrophularia Tourn. ex L. | 
|   | Scutellaria L. | 
|   | Scybalium Schott & Endl. | 
| Searsia (Thunb.) Moffett | |
|   | Securigera DC. | 
|   | Sedum L. | 
|   | Seetzenia R.Br. | 
|   | Selaginella P.Beauv. | 
|   | Selenicereus (A. Berger) Britton & Rose | 
|   | Selinum L. | 
|   | Selliguea Bory | 
| Semele Kunth | |
|   | Semenovia Regel & Herder | 
|   | Semiaquilegia Makino | 
|  | Semiramisia Klotzsch | 
|   | Sempervivum L. | 
|   | Senecio L. | 
|   | Senna Mill. | 
| Sequencia Givnish | |
|   | Serpocaulon A.R.Sm. | 
|   | Serratula L. | 
|   | Serruria Salisb. | 
| Sesamothamnus | |
| Sesamum | |
|   | Seseli L. | 
| Sesuvium L. | |
|   | Shortia Torr. & A.Gray | 
|   | Sibbaldianthe Juz. | 
|   | Sida L. | 
|   | Sidalcea A.Gray ex Benth. | 
|   | Siderasis Raf. | 
|   | Silene L. | 
| Siler Mill. | |
|   | Silphiodaucus (Koso-Pol.) Spalik, Wojew., Banasiak, Piwczyński & Reduron | 
|   | Silphium L. | 
|   | Silybum Adans. | 
|   | Simpsonanthus Guilliams, Hasenstab & B.G.Baldwin | 
| Sinacalia H.Rob. & Brettell | |
| Sincoraea Ule | |
|   | Sinningia Nees | 
| Sinosenecio B.Nord. | |
|   | Siphocampylus Pohl | 
|   | Siphonochilus J.M.Wood & Franks | 
|   | Sisyrinchium Eckl. | 
| Skiatophytum L.Bolus | |
| Sleumerodendron Virot | |
|   | Smelowskia C.A.Mey. | 
| Smicrostigma N.E.Br | |
|   | Smilax L. | 
|   | Smithiantha Kuntze | 
|   | Smithiastrum Morin | 
|   | Socratea H.Karst. | 
|   | Solandra Sw. | 
| Solanecio (Sch.Bip.) Walp. | |
|   | Solanum L. | 
|   | Soldanella L. | 
|   | Solenandra Hook.f. | 
|   | Solenopsis C.Presl | 
| Solonia Urban | |
|   | Somrania D.J.Middleton | 
|   | Sonerila Roxb. | 
| Sophora L. | |
|   | Sorbus L. | 
| Sorocephalus R.Br. | |
|   | Sowerbaea Sm. | 
|   | Sparaxis Ker Gawl. | 
|   | Sparganium L. | 
| Spatalla Salisb. | |
|   | Spathiphyllum Schott | 
|   | Spathodea P.Beauv. | 
|   | Spatholobus Hassk. | 
| Speirantha Baker | |
|   | Spermacoce L. | 
| Spetaea Wetschnig & Pfosser | |
|   | Sphaerocarpos [ Micheli ] Boehm. ex Ludwig | 
|   | Sphaerocoryne Scheff. ex Ridl. | 
|   | Sphaeropteris Bernh. | 
| Sphalmium (C.T.White) B.G.Briggs, B.Hyland & L.A.S.Johnson | |
|   | Spigelia L. | 
|   | Spinulum A.Haines | 
|   | Spiraea L. | 
|   | Spirodela Schleid. | 
|   | Sprekelia Heist. | 
|   | Stachys L. | 
|   | Stapelia L. | 
|   | Stapelianthus Choux ex A.C.White & B.Sloane | 
|   | Staurogyne Wall. | 
| Stayneria L.Bolus | |
|   | Stegnosperma Benth. | 
| Steirodiscus Less. | |
|   | Stellaria L. | 
|  | Stemona Lour. | 
|   | Stemonitopsis (Nann.-Bremek.) Nann.-Bremek. | 
|   | Stenanthera R.Br. | 
|   | Stenanthium (A.Gray) Kunth | 
|   | Stenocactus (K. Schum.) A. Berger | 
| Stenocarpus R.Br. | |
|   | Stenocereus (A. Berger) Riccob. | 
| Stenomeris Planch. | |
| Stenomesson Herb. | |
|   | Stephania Lour. | 
|   | Stephanocereus A. Berger | 
|   | Stephanotis Thouars | 
|   | Stereospermum Cham. | 
|   | Sternbergia Waldst. & Kit. | 
|   | Stetsonia Britton & Rose | 
|   | Stewartia I.Lawson | 
| Steyerbromelia L.B.Sm. | |
|   | Stictocardia Hallier f. | 
|   | Stifftia J.C.Mikan | 
|   | Stigmatodon Leme | 
| Stilpnogyne DC. | |
| Stimpsonia C.Wright ex A.Gray | |
|   | Stirlingia Endl. | 
| Stoeberia Dinter & Schwantes | |
|   | Stokesia L'Hér. | 
| Stomatium Schwantes | |
| Strangea Meisn. | |
|   | Strelitzia Banks | 
|   | Streptopus Michx. | 
|   | Streptosolen Miers | 
|   | Striga Lour. | 
|   | Strobilanthes Blume | 
|   | Strombocactus Britton & Rose | 
|   | Strongylodon Vogel | 
|   | Strophanthus DC. | 
| Strophioblachia Boerl. | |
| Strophocactus Britton & Rose | |
|   | Strophostyles Elliott | 
|   | Strumaria Jacq. | 
|   | Strychnos L. | 
|   | Stylidium Sw. ex Willd | 
| Stylogyne A.DC. | |
|   | Stylophorum Nutt. | 
|   | Stylosanthes Sw. | 
|   | Styphelia Sm. | 
|   | Styrax L. | 
|   | Suaeda Forssk. ex J.F.Gmel. | 
| Sulla Medik. | |
|   | Swainsona Salisb. | 
|   | Swertia L. | 
| Symphionema R.Br. | |
|   | Symphyotrichum Nees | 
|   | Symphytum Tourn. ex L. | 
|   | Symplocarpus Salisb. ex W.P.C.Barton | 
|  | Synaphea R.Br. | 
|   | Syneilesis Maxim. | 
| Synotis (C.B.Clarke) C.Jeffrey & Y.L.Chen | |
|   | Syrenia Andrz. ex Besser | 
| Systellantha B.C.Stone | |
|   | Syzygium Gaertn. | 
|   | Tabernaemontana Plum. ex L. | 
|   | Tacca J.R.Forst. & G.Forst. | 
|   | Taccarum Brongn. ex Schott | 
| Tacinga Britton & Rose | |
| Talamancalia H.Rob. & Cuatrec. | |
| Talinopsis A.Gray | |
|   | Talinum Adans. | 
|   | Tamarindus Tourn. ex L. | 
|   | Tanacetum L. | 
| Tanakaea Franch. & Sav. | |
| Tanquana H.E.K.Hartmann & Liede | |
|   | Tapeinochilos Miq. | 
| Tapeinosperma Hook.f. | |
|   | Tarasa Phil. | 
|   | Taraxacum F. H. Wigg. | 
| Taraxia (Torr. & A.Gray) Raim. | |
| Tavaresia Welw. | |
|   | Taxus L. | 
|   | Tecomanthe Baill. | 
|   | Tecophilaea Bertero ex Colla | 
|   | Tectaria Cav. | 
| Tecticornia Hook. f. | |
|   | Telopea R.Br. | 
|   | Tephrocactus Lem. | 
| Tephroseris (Rchb.) Rchb. | |
|   | Tephrosia Pers. | 
|   | Teratophyllum Mett. ex Kuhn | 
| testgenus asd | |
|   | Tetradenia Benth. | 
| Tetradymia DC. | |
|   | Tetraglochin Poepp. | 
|   | Tetragonia L. | 
|   | Tetragonotheca L. | 
|   | Tetrapanax (K.Koch) K.Koch | 
| Tetrapteron (Munz) W.L. Wagner & Hoch | |
|   | Teucrium L. | 
|   | Thalictrum L. | 
|   | Thaumatophyllum Schott | 
|  | Thelocactus (K. Schum.) Britton & Rose | 
|   | Thelypteris Schott | 
|   | Theobroma L. | 
| Theophrasta L. | |
|   | Thereianthus G.J.Lewis | 
|   | Theridion Walckenaer | 
| Theriophonum Blume | |
|   | Thermopsis R.Br. | 
| Theropogon Maxim. | |
|   | Thesium L. | 
|   | Thismia Griff. | 
|   | Thlaspi L. | 
|   | Thonningia Vahl | 
|   | Thottea Rottb. | 
| Threlkeldia R.Br. | |
|   | Thunbergia Retz. | 
|   | Thymelaea Mill. | 
|   | Thymophylla Lag. | 
|   | Thymus L. | 
|   | Thysanocarpus Hooki. | 
|   | Thysanotus R.Br. | 
|   | Tiarella L. | 
| Tibouchina Aubl. | |
|   | Tigridia Juss. | 
|   | Tillandsia L. | 
|   | Tinnea Kotschy ex Hook.f. | 
|   | Tiputinia P.E.Berry & C.L.Woodw. | 
|   | Titanopsis Schwantes | 
|   | Tithonia Desf. ex Juss. | 
|   | Tolpis Adans. | 
|   | Tolypanthus (Blume) Rchb. | 
|   | Tontelea Miers | 
|   | Torenia L. | 
| Torminalis Medik. | |
| Toronia L.A.S.Johnson & B.G.Briggs | |
|   | Torreya Arn. | 
|   | Tourrettia Foug. | 
|   | Townsendia Hook. | 
|  | Toxicoscordion Rydb. | 
|   | Trachelium Tourn. ex L. | 
|   | Tradescantia Ruppius ex L. | 
|   | Tragia Plum. ex L. | 
|   | Tragopogon L. | 
|   | Trapa L. | 
|   | Trautvetteria Fisch. & C.A.Mey. | 
| Traversia Hook.f. | |
| Trianaea Planch. & Linden | |
| Trianthema L. | |
| Tribonanthes Endl. | |
| Tribulocarpus S.Moore | |
|   | Tribulus L. | 
|   | Trichocladus Pers. | 
|   | Trichocline Cass. | 
|   | Trichodesma R.Br. | 
|  | Trichodiadema Schwantes | 
| Trichodrymonia Oerst. | |
|   | Trichomanes L. | 
| Trichopus Gaertn. | |
|   | Trichosanthes L. | 
|   | Trichostema L. | 
|   | Trichostigma A. Rich. | 
|   | Tricyrtis Wall. | 
|   | Tridentea Haw. | 
|   | Tridynamia Gagnep. | 
| Trientalis L. | |
|   | Trifolium Tourn. ex L. | 
|   | Trilepis Nees | 
|   | Trillium L. | 
|  | Trimezia Salisb. ex Herb. | 
|   | Triodanis Raf. | 
|   | Tripterococcus Endl. | 
|   | Tripterospermum Blume | 
|   | Triptilion Ruiz & Pav. | 
|  | Tristagma Poepp. | 
|   | Triteleia Douglas ex Lindl. | 
|   | Tritonia Ker Gawl. | 
| Triunia L.A.S.Johnson & B.G.Briggs | |
|   | Trixis P.Browne | 
|   | Trollius L. | 
|   | Tromostapelia P.V.Heath | 
|   | Tromotriche Haw. | 
|   | Tropaeolum L. | 
|   | Trozelia Raf. | 
| Tsuga (Endl.) Carrière | |
|   | Tulbaghia L. | 
|   | Tulipa L. | 
|  | Tunilla D.R. Hunt & Iliff | 
| Tupistra Ker Gawl. | |
|  | Turbinicarpus (Backeb.) Buxb. & Backeb. | 
| Turrillia A.C.Sm. | |
|   | Turritis Tourn. ex L. | 
| Tussilago L. | |
|   | Tylecodon Toelken | 
|   | Typha L. | 
|   | Typhonium Schott | 
|   | Uebelmannia Buining | 
|   | Ulearum Engl. | 
|   | Uncarina Stapf | 
|   | Ungernia Bunge | 
|   | Uraria Desv. | 
|  | Urceolina Rchb. | 
|   | Urena Dill. ex L. | 
| Urophysa Ulbr. | |
|   | Urospatha Schott | 
|   | Urtica L. | 
|   | Utricularia L. | 
|   | Uvaria L. | 
|   | Uvularia L. | 
|   | Vaccinium L. | 
|   | Vagaria Herb. | 
|   | Valeriana L. | 
|   | Vallaris Burm.f. | 
|   | Vallea Mutis ex L.f. | 
|   | Vandellia L. | 
| Vanheerdea L.Bolus ex H.E.K.Hartmann | |
|  | Vanhouttea Lem. | 
| Vanzijlia L.Bolus | |
| Varronia P.Browne | |
|   | Vatica L. | 
| Vatricania Backeb. | |
| Vegaea Urban | |
|   | Vellozia Vand. | 
|   | Velloziella Baill. | 
|   | Veltheimia Gled. | 
|   | Veratrum L. | 
|   | Verbascum L. | 
|   | Verbena L. | 
|   | Verbesina L. | 
| Verhuellia Miquel | |
|   | Veronica L. | 
|   | Veronicastrum Heist. ex Fabr. | 
|   | Verpa Sw. | 
|   | Vestia Willd. | 
| Vexatorella Rourke | |
|   | Viburnum L. | 
|   | Vicia L. | 
| Vickifunkia C.Ren, L.Wang, I.D.Illar. & Q.E.Yang | |
|   | Victoria Lindl. | 
|   | Vincetoxicum Wolf | 
|   | Viola L. | 
| Virotia L.A.S.Johnson & B.G.Briggs | |
|   | Viscaria Bernh. | 
| Vitis L. | |
| Vlokia S.A.Hammer | |
| Votschia B.Ståhl | |
|   | Vriesea Lindl. | 
|   | Wahlenbergia Schrad. ex Roth | 
|   | Wallaceodendron Koord. | 
| Wallenia Sw. | |
|   | Wallisia (Regel) É.Morren | 
| Waltillia Leme | |
|   | Warea Nutt. | 
|   | Watsonia Mill. | 
| Weberbauerocereus Backeb. | |
| Weberocereus Britton & Rose | |
|   | Weigela Thunb. | 
|   | Weldenia Schult.f. | 
|   | Welwitschia Hook.f. | 
|   | Werauhia J.R.Grant | 
|   | Wercklea Pittier & Standl. | 
| Werneria Kunth | |
|   | Wigandia Kunth | 
|   | Wightia Wall. | 
|   | Wisteria Nutt. | 
|   | Withania Pauquy | 
| Wittmackia Mez in C.F.P.von Martius & auct. suc. (eds.) | |
|   | Wittsteinia F.Muell. | 
|   | Wollemia W.G.Jones, K.D.Hill & J.M.Allen | 
|   | Woodsia R.Br. | 
| Wooleya L.Bolus | |
|   | Worsleya (Traub) Traub | 
|   | Wrightia R.Br. | 
|   | Wunderlichia Riedel ex Benth. & Hook.f. | 
|   | Wurfbainia Giseke | 
|   | Wurmbea Thunb. | 
| xAechbergiopsis | |
| xAechopsis | |
| xAnagelia | |
| xAnamea | |
| xAnanananas | |
| xAndrolaechmea | |
|   | Xanthium L. | 
|   | Xanthorhiza Marshall | 
|   | Xanthosia Rudge | 
|   | Xanthostemon F.Muell. | 
| xBarcinaea | |
| xBarvriesea | |
| xBillmea | |
| xBillnelia | |
| xBillya | |
| xBiltanthus | |
| xCanbillmea | |
| xCanegelia | |
| xCanmea | |
| xCryptananas | |
| xCryptbergia | |
| xCryptmea | |
| xDeuterocairnia | |
| xDyckcohnia | |
| xDycklirium | |
| xDycktia | |
| xEnchotia | |
|   | Xenophyllum V.A.Funk | 
|   | Xenostegia D.F.Austin & Staples | 
|   | Xeranthemum L. | 
| Xerolirion A.S.George | |
|   | Xeronema Brongn. & Gris | 
|   | Xerophyllum Michx. | 
|   | Xerophyta Juss. | 
| xForzzanthus | |
| xGuzgoudaea | |
| xGuzlandsia | |
| xGuzlutheria | |
| xGuzvriesea | |
| xHechcohnia | |
| xHohenelia | |
| xHohenmea | |
| xHohenquesmea | |
| xHohentea | |
| xLuthandsia | |
| xNeobergia | |
| xNeobergiopsis | |
| xNeomea | |
| xNeomundoa | |
| xNeophytum | |
| xNeorockia | |
| xNeostropsis | |
| xNeotanthus | |
| xNidbergia | |
| xNidulistrum | |
| xNidumea | |
| xNiduregelia | |
| xNidusincoraea | |
| xOrthocohnia | |
| xOrthoglaziovia | |
| xOrtholarium | |
| xOrthomea | |
| xOrthotanthus | |
| xPiterella | |
| xPitinia | |
| xPitkia | |
| xPortemea | |
| xPseudanamea | |
| xPuckia | |
| xPucohnia | |
| xPulirium | |
| xQuesistrum | |
| xQuesmea | |
| xQuesregelia | |
| xRacindsia | |
| xRokautanthus | |
| xRokautsincoraea | |
| xSincoraechmea | |
| xSincoregelia | |
| xSincorglaziovia | |
| xSincorphytum | |
| xSincortanthus | |
| xUrsulepis | |
| xUrsumea | |
| xVriecantarea | |
| xVrierauhia | |
| xVriesgoudaea | |
| xVrieslandsia | |
| xVrieslutheria | |
| xWallandsia | |
| xWallfussia | |
| xWittmea | |
| Xylomelum Sm. | |
| Xylonagra Donn.Sm. & Rose | |
|   | Xylorhiza Nutt. | 
|   | Xyris Gronov. ex L. | 
| xZizkagoudaea | |
|   | Yavia R. Kiesling & Piltz | 
| Yermo Dorn | |
| Yua C.L.Li | |
|   | Yucca L. | 
| Yungasocereus F. Ritter | |
| Zaleya Burm.f. | |
|   | Zamia L. | 
|   | Zamioculcas Schott | 
|   | Zantedeschia Spreng. | 
|   | Zeltnera G.Mans. | 
|   | Zephyranthes Herb. | 
| Zeuktophyllum N.E.Br | |
|   | Zigadenus Michx. | 
|   | Zilla Forssk. | 
|   | Zingiber Mill. | 
|   | Zinnia L. | 
| Zippelia Blume | |
|   | Zizia W.D.J.Koch | 
|   | Ziziphora L. | 
| Zizkaea W.Till & Barfuss | |
|   | Zoegea L. | 
|   | Zygophyllum L. |