Kalanchoe? 4 petal white flowers.

Hi all, my sister is trying to ID this quite ordinary kalanchoe? It looks almost identical to kalanchoe marmorata, but without the red variations in the leaves. 4 petal white flower. The leaves look like they vary in colour from green to blue/purple, probably dependent on the sun exposure. TIA

 

Have you made any progress on this ID?

 

No update. I think marmorata can grow without variegated leaves. I've seen one, only one, photo of it. Even some of the large succulent forums have been unable to ID it.

 

TY for the update. It's a very cool plant, by any name. If you do find its' name elsewhere, please come back to tell us here if you remember.

 

It seems it's Kalanchoe Prittwitzii, or that's the closest to it found online. http://www.crassulaceae.ch/de/artikel?akID=68&aaID=2&aiID=P&aID=4452

 

That does look like a possible match!