Christmas Cactus (Schlumbergera x buckleyi)
On the above page, every pic except 2 from Cahac are clearly S. truncata, not S. x buckleyi. In every other pic are one of 2 clues that clearly indicate S. truncata. There are either points on the leaves, and/or the flowers are leaning (not radially symmetrical.)
This page is the best I've seen for differentiating the holiday cacti. The line drawings are especially helpful. The differences are subtle, but once you see them, very obvious.
http://cactus.biology.dal.ca/p...
It doesn't help that they are sold with labels that say 'holiday cacti,' 'Zygocactus,' or even 'Christmas cactus' regardless of species, but can these pics please be moved to the S. truncata page?