Twinevine (Funastrum clausum)

Full sun to part shade
Average to low water needs
Bloom time: Summer, Fall
Size: 20-30 ft tall

Twining vine. Host plant for the queen, soldier, and monarch butterfly, although not a favorite of monarchs.  Can be aggressive in a home landscape. 

Price: $6.99 (1 gal)

https://www.fnps.org/plant/funastrum-clausum