Common names are a pet peeve of mine, so I have to post another comment. In perusing a gardening book, I found Sesbania referred to as "scarlet wisteria tree". Which led me to pose the question, why isn't wisteria called "purple Sesbania vine"? I find it extremely annoying and very confusing to novice gardeners that a completely different genus is used in describing a plant (as in Arum lily - actually this uses TWO different genera). It's difficult, though, when you get ridiculed for using botanical names. One lady, when I used the botanical name for a plant, actually said "my, aren't we hoity-toity". Sigh. Diana Telos