Ceropegia sp. ‘Babati’ & Ceropegia sp. ‘Tanzania, 10 km W of Arusha’ = Ceropegia imbricata E. A. Bruce & P. R. O. Bally
According to P. S. Masinde: Notes on Archer’s (1992) Kenya Ceropegia Scrapbook. Haseltonia 6: 107-114. 1998, which I received today, the first of the two mentioned plants may very well be Ceropegia imbricata, the other one perhaps too.