Tephrosia purpurea
Wild Indigo

This flowering plant is a member of the pea family, blooming lovely pink flowers among solitary green leaflets. The perennial herb grows to about 1.5 meters (5 feet) and has a slightly woody appearance. An excellent ornamental!

Treat as a tropical that cannot tolerate frost.
 

Fun Facts:
 
 Hardy outdoors in zones 9+
 Known in Hawaii as Auhuhu
 Thrives in poor soil