The Kentucky wisteria (Wisteria macrostachya) belongs to Fabaceae (the Pea family). It is a deciduous woody vine that is native to Texas, Illinois, Georgia and North Carolina in the United States. This vine grows in hills and dales, along rivers, and can reach 6-10 m in height. It resembles to Japanese wistria, though it is more hardy. The leaves are impari-pinnate and turn yellow in fall. The violet flowers bloom in long drooping racemes from April to June.