They are two different species, although they look very similar. Both are from New Guinea, as are B. brevirimosa and B. exotica, which also look almost identical.

Elizabeth

Hello, Elizabeth:
Am I right in thinking I might have both species?

I was rather surprised to see a nursery list the two together since beyond shape they don't appear to be the same.

I've learned a lot on this forum and I thank you all. I also enjoy the AV and Gesnariad forums!
Linda

I'm still trying to figure out what Begonia I have pictured on our photo webpage. Kartuz(?) nursery is where I thought I found an ID on it.
Randy

Hi, Randy:
Kartuz uses bipinnatifida and warburgii interchangeably; that's the main reason I asked the original question. The Kartuz listing caused me no end of confusion, I can tell you.

Love your site; I go there often just to gaze :-)
Linda