Hasn't that got pale flowers, or can they be more than one colour?
http://www.flickr.com/photos/m...
These could turn colour but the calyx doesn't look to match ..
http://131.230.176.4/users/par...
Tephrosia spicata has red flowers .. but they start pale yellow. The calyx are hairy ..
http://alabamaplants.com/Redal...
http://www.southeasternflora.c...
http://www.vaplantatlas.org/in...
There's a couple in Florida which don't bring up any photos, Tephrosia X floridana and Tephrosia rugelii.
