Vicia graminea

Vicia graminea is a species of flowering plant in the vetch genus Vicia, family Fabaceae. It is native to South America, where it has a meandering distribution in Colombia, Peru, Bolivia, Paraguay, northeast Argentina, southern Brazil, Uruguay, and southern Chile. It is the source for a lectin that is used to identify the N blood group antigen.

Subtaxa
The following subtaxa are accepted:
 * Vicia graminea var. graminea – entire range
 * Vicia graminea var. nigricarpa N.R.Bastos & Miotto – southern Brazil
 * Vicia graminea var. transiens Burkart – northeast Argentina, Uruguay