Real Dictionary

wisteria
uncountable noun: Wisteria is a type of climbing plant which has pale purple or white flowers.

wisteria in American English
any of a genus (Wisteria) of twining woody vines or shrubs of the pea family, with fruits that are pods and showy clusters of bluish, white, pink, or purplish flowers: native to the E U.S. and E Asia
noun: any climbing shrub belonging to the genus Wisteria, of the legume family, having showy, pendent clusters of blue-violet, white, purple, or rose flowers

wisteria in British English
noun: any twining leguminous woody climbing plant of the genus Wisteria, of E Asia and North America, having blue, purple, or white flowers in large drooping clusters