In sabulosis prope Leopoldville pone Stanley-Pool (Congo). VI. 1899 — No. 12533.
2. C. caracasanus H. B. et Kth.
In collibus graminosis inter Ibadan et Abeokuta (Yoruba-Land). III. 1899 — No. 13017.
3. C. cuspidatus H. B. et Kth.
In arenosis prope Leopoldville ad Stanley-Pool (Congo). VI. 1899 — No. 12517.
4. C. diffusus Vahl.
In silvis prope Coquilhatville (Congo). VII. 1899 — No. 12605.
5. C. rotundus L.
In humidis prope Ikorodu (Yoruba-Land). III. 1899 — No. 12297. In arenosis prope Leopoldville, pone Stanley-Pool (Congo). VI. 1899 — No. 12515.
6. C. radiatus Vahl.