F. cienkowskii and F. tetraquetra have the largest distribution and occur from Guinea to the Transvaal province.

F. ancylantha and F. erythrophloea are also found in many African countries, but they don't occur so far south.

[2] Endophytic bacteria are housed in the intercellular space of the leaf mesophyll tissue.

The bacteria are identified as Burkholderia, which is a genus that is also found in the leaves of other Rubiaceae species.

[5] Fadogia homblei is known to cause gousiekte, a cardiotoxicosis of ruminants characterised by heart failure four to eight weeks after ingestion of certain rubiaceous plants.