Wisteria frutescens.en.wikipedia.org (Accessed 5/2014).

Wisteria frutescens  is a woody vine to 12 m long, young stems hairless. 

Leaves alternate, pinnately compound, leaflets 9-14, elliptic to oblong, 2-5 cm, tip pointed, base wedge-shaped to rounded, slightly hairy below.

Flowers lilac-purple, 1.5-1.8 cm, in clusters 4-10 cm with densely hairy stems;

Fruit pod 5-10 cm, hairless (Rehder 1986). 

Wetland status: FACW-. 

Frequency in NYC: Very infrequent. 

Origin: Virginia and south. 

Habitat: Escaped from cultivation, soil pH 4-7 (USDA, NRCS 2010).