Have no idea what exact species is, since I got it, I always have kept it in emerse form. My guess is that is a C.wendtii, but to be sure, just after you guys say so
The fact that the collar is dark and the limb is twisted would seem to put it in the C. wendtii group. There is a lot of variation in the flowers of the different wendtii varieties, and some of them look rather close to beckettii flowers.
Crypt ID (with flower) 
Linear Mode
