Other genera

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	Genus	ranks
	Ibatia Decne.	tribe Asclepiadeae None
	Ichtyoselmis Lidén & T.Fukuhara	subfamily Fumarioideae tribe Fumarieae subtribe Corydalinae
	Idahoa A.Nelson & J.F.Macbr.	None
	Idiospermum S.T.Blake	None
	Ilex Tourn. ex L.	None
	Illicium L.	None
	Imaia Trappe & Kovács	None
	Impatiens L.	None
	Indigofera L.	tribe Indigofereae None
	Inula L.	tribe Inuleae None
	Ioanella Granier & Berthou	None
	Iochroma Benth.	tribe Physaleae None
	Ipheion Raf.	tribe Gilliesieae None
	Iphigenia Kunth	None
	Iphiona Cass.	tribe Inuleae None
	Ipomoea L.	tribe Ipomoeeae None
	Ipomopsis Michx.	None
	Iranecio B.Nord.	tribe Senecioneae None
	Iris Tourn. ex L.	tribe Irideae None
	Ismelia Cass.	subfamily Asteroideae tribe Anthemideae subtribe Glebionidinae
	Isodon (Schrad. ex Benth.) Spach	tribe Ocimeae None
	Isoetes L.	None
	Isopogon R.Br. ex Knight	subfamily Proteoideae tribe Leucadendreae subtribe Isopogoninae
	Isopyrum L.	None
	Itatiella G.L. Sm.	None
	Itea L.	None
	Ixiolirion Fisch. ex Herb.	None
	Ixora L.	None