| Poaceae | |
Pentarrhaphis annua
| Swallen | Ceiba 4(5): 286 | 1955 |
| Poaceae | |
Pentarrhaphis fourneriana
| Hack. & Scribn. | Bull. Torrey Bot. Club 17(8): 229232–233, t. 107–108 | 1890 |
| Poaceae | ** |
Pentarrhaphis geminata
| Hack. & Scribn. | Bull. Torrey Bot. Club 17: 230 | 1890 |
| Poaceae | |
Pentarrhaphis paupercula
| (J. Presl) Hack. & Scribn. | Bull. Torrey Bot. Club 17: 233 | 1890 |
| Poaceae | |
Pentarrhaphis polymorpha
| (E. Fourn.) Griffiths | Contr. U.S. Natl. Herb. 14(3): 357, f. 21 | 1912 |
| Poaceae | |
Pentarrhaphis scabra
| Kunth | Nov. Gen. Sp. (quarto ed.) 1: 178, t. 60 | 1815 [1816] |