Lathyrus pratensis is accepted species in  the family Fabaceae  subfamily: Faboideae, tribe: Fabeae,  
Genus Lathyrus 
This species is found in Afghanistan, Albania, Altay, Austria, Baltic States, Belarus, Belgium, Bulgaria, Buryatiya, Central European Rus, China North-Central, China South-Central, Chita, Corse, Czechoslovakia, Denmark, East Aegean Is., East European Russia, Ethiopia, Finland, France, Føroyar, Germany, Great Britain, Greece, Hungary, Iceland, India, Iran, Iraq, Ireland, Italy, Kazakhstan, Kirgizstan, Krasnoyarsk, Krym, Lebanon-Syria, Manchuria, Mongolia, Morocco, Nepal, Netherlands, North Caucasus, North European Russi, Northwest European R, Norway, Pakistan, Poland, Portugal, Qinghai, Romania, Sardegna, Sicilia, South European Russi, Spain, Sweden, Switzerland, Tadzhikistan, Transcaucasus, Turkey, Turkey-in-Europe, Ukraine, Uzbekistan, West Himalaya, West Siberia, Xinjiang, Yemen, Yugoslavia.