Kudzu is a deciduous twining vine that spreads rapidly and covers everything in its path with a dense tangle of hairy stems and large trifoliate leaves. The leaves are alternate, on rather long petioles, and each leaflet is 4-7 in (10.2-17.8 cm) long, with the middle one the longest. The purple flowers are fragrant and borne in showy erect clusters (racemes) to 10 in (25.4 cm) long. The fruit is an elongate, flat legume. Kudzu can grow up to 1 ft (0.3 m) a day and the vine can reach more than 100 ft (30.5 m) in a season. It usually dies back to the ground in winter and persists there, which provides the energy to regrow very rapidly the following spring.
Pueraria lobata Plant Profile - Floridata, http://mobile.floridata.com/Plants/Fabaceae/Pueraria%20lobata/592 (accessed January 24, 2017).