Vicia americana is a perennial, herbaceous vine to 1 m, stems smooth, trailing, climbing; stipules sharply toothed.
Leaves alternate, evenly pinnate, leaflets 4-8 pairs, to 3.5 cm long, 1.4 cm wide, oblong to elliptic often rounded and bristle -tipped, terminal leaflet a tendril.
Flowers blue-purple, pea flower-shaped, to 2 cm long, calyx teeth unequal, in unbranched, shorter than leaves.
Fruit pod to 3.5 cm, seeds 0.4 cm.
Wetland status: UPL.
Frequency in NYC: Very infrequent.
Origin: Native to Western NYS, most of USA except south.
Habitat: Thickets and meadows, moist woods, soil pH 5.9-7.2 (USDA, NRCS 2010).