Actually, this has come up on ATP before. On Feb 3, 2012 here is a post from Dave:
"According to MOBOT's Tropicos, K. thyrsiflora is a synonym for Kalanchoe tetraphylla.
The same source says that Kalanchoe luciae is a synonym and should be replaced by Kalanchoe luciae subsp. luciae."
That's what I found on the web also. The trouble with my doing the research is knowing how authoritative the source may be - or not. I'm inclined to think all my photos should be under Kalanchoe luciae ssp luciae. So I'm in agreement with what is in Dave's post indicated above.
