Melocactus smithii
Melocactus smithii in Repert. Pl. Succ. 25: 11. 1976 sec. Hunt 20061 wfo-0001289486
- ≡Cactus smithii in Lloydia 2: 200. 1939 syn. sec. Hunt 20061 wfo-0000578231
- Guyana, Rupununi Distr.: NW slopes of Kanuku Mt., in drainage of Mokumoku creek (Takutu tributary), alt. 150 – 400 m, 31 Mar 1938, A.C. Smith 3388 (S barcode S04-767; holotype: NY barcode NY00118696; isotypes: B barcode B 10 0277792, F barcode F0052851F, G barcode G00236535, GH barcode GH00061808, LE barcode LE00006962, LIL barcode LIL000959, MO barcode MO-313089, U barcode U0008007)
- =Melocactus roraimensis in Cact. Succ. J. (Los Angeles) 63: 12, f. 1, 3. 1991 syn. sec. Hunt 20062 wfo-0001289726