Ok Greg I am waiting.....you sure are a tantalizing guy, LOL! Hmmmm, if you are willing to accept Robert's diagnosis of my plants I can help you out with the D. venusta. Seed was sent to me as the "coccicaulis" variety but Robert says it looks more like the D. venusta he is familiar with. Let me know if you are interested. I confess I can not sense the differences between the various web posted photos of either, and generally regard both as local varient's of D. natalensis. Both are erect, but with a different coloration: one golden green (which I associate with the D. coccicaulis var.), and the other olive green. Both seem to have various degrees of truncate to spathulate lamina. I doubt that a completely flat form could be interpeted as other than typical D. natalensis, or am I missing something? I have a hard enough time seeing any special status to the more erect forms.
I hope you post those photos soon, the suspense is killing me!