Oooh,
Hardy White Gloxinia (Sinningia tubiflora) is a nice one, I love those long white tubular flowers and they are said to attract Hummingbirds! I've grown a few Sinningia's over the years but never S. tubiflora. It does need bright light, direct sun is apparently ok for this one (but I'm not sure about our intense Fla. sun) and a well draining potting soil is definitely a must. This one is drought tolerant too, so I'd go light on the water; they go dormant during the winter.
I just googled and found this interesting information:
http://www.smgrowers.com/produ...