Lathyrus latifolius.en.wikipedia.org (Accessed 2/2016).

Lathyrus latifolius is a herbaceous perennial vine, from rhizomes, stems to 2 m long, pale blue-green, broadly winged, 0.5-1 cm wide; stipules 2.5-4 cm long, narrow, paired at nodes. 

Leaves alternate, stalk broadly winged, blade 2-parted, central leaflet replaced by a branched tendril, leaflets lance-shaped to elliptic, narrow 4-8 cm long, 1-3 cm wide, sessile. 

Flowers pink-purple, or white, showy, bilaterally symmetrical, pea-flower-shaped, 1.5-3 cm wide, calyx lobes very unequal. 

Fruit dry, hollow pod 6-10 cm long, 10-15 seeded; blooming June-Aug. 

Wetland status: NL. 

Frequency in NYC: Infrequent. 

Origin: Europe. 

Habitat: Escaped from cultivation in open areas, fill, roadsides.