Vicia tenuifolia is accepted species in  the family Fabaceae  subfamily: Faboideae, tribe: Fabeae,  
Genus Vicia 
This species is found in Afghanistan, Albania, Algeria, Altay, Austria, Baltic States, Belarus, Belgium, Bulgaria, Central European Rus, China South-Central, Corse, Czechoslovakia, Denmark, East Aegean Is., East European Russia, France, Germany, Greece, Hungary, Iran, Iraq, Italy, Kazakhstan, Kirgizstan, Korea, Krasnoyarsk, Kriti, Krym, Lebanon-Syria, Mongolia, Morocco, Nepal, North Caucasus, North European Russi, Northwest European R, Pakistan, Palestine, Poland, Portugal, Romania, Sardegna, Sicilia, South European Russi, Spain, Sweden, Switzerland, Tadzhikistan, Transcaucasus, Turkey, Turkey-in-Europe, Tuva, Ukraine, Uzbekistan, West Himalaya, West Siberia, Xinjiang, Yugoslavia.