| Orchidaceae | |
Physoceras australe
| Boiteau | Bull. Acad. Malgache, n.s. 24: 88 | 1941 |
| Orchidaceae | |
Physoceras bellum
| Schltr. | Repert. Spec. Nov. Regni Veg. 33: 79 | 1925 |
| Orchidaceae | |
Physoceras betsomangense
| Bosser | Adansonia, n.s. 20(3): 258–260, pl. 1 (f.1–4) | 1980 |
| Orchidaceae | |
Physoceras bifurcum
| H. Perrier | Mém. Inst. Sci. Madagascar, Sér. B, Biol. Vég. 6: 254 | 1955 |
| Orchidaceae | |
Physoceras boryanum
| (A. Rich.) Bosser | Adansonia, n.s. 20(3): 257 | 1980 |
| Orchidaceae | |
Physoceras castillonii
| P. Bernet | Richardiana 10(3): 144–150, f. 1–2, pl. 1 | 2010 |
| Orchidaceae | |
Physoceras epiphyticum
| Schltr. | Repert. Spec. Nov. Regni Veg. Beih. 33: 80 | 1925 |
| Orchidaceae | |
Physoceras lageniferum
| H. Perrier | Mém. Inst. Sci. Madagascar, Sér. B, Biol. Vég. 6: 254 | 1955 |
| Orchidaceae | |
Physoceras mesophyllum
| Schltr. | Repert. Spec. Nov. Regni Veg. Beih. 33: 82 | 1925 |
| Orchidaceae | |
Physoceras perrieri
| Schltr. | Repert. Spec. Nov. Regni Veg. Beih. 33: 82 | 1925 |
| Orchidaceae | |
Physoceras rotundifoolium
| H. Perrier | Notul. Syst. (Paris) 14: 144 | 1951 |
| Orchidaceae | |
Physoceras violaceum
| Schltr. | Repert. Spec. Nov. Regni Veg. Beih. 33: 83 | 1925 |