Ahhhh, the problem again rears it's ugly head. I have spent MUCH time tracing this down.
The plant in question is D. nidiformis, known also as D. "sp. Mageliesburg". It was marketed for close to a decade as D. magagascariensis by various nurseries all over the world and has turned up in nearly every seedbank exant. Several nurserymen wrote to me admitting the error when I made inquiry on the listserve.
At this stage of the exponential spread, all that can be done is to address this topic over and over in as many public forums as possible. The problem will never go away.
The true D. madagascariensis is a caulescent (stem forming) species. If you have D. "sp. Botswana" you have D. madagascariensis according to Dr. Vitor Olivera de Miranda who did analysis of the ribosomal DNA. (Pers. Comm.)
This form of D. nidiformis stays green in strong light, and is over all larger than the form of D. nidiformis with more red pigment. The latter has been distributed by the ICPS seed bank.
There is no evidence that this is a hybrid, per se, but if you have followed this thread, you have some idea of the intricate problems regarding S.A. species in general.
This is a beautiful photo of the plant Noah. Well done!