| Rubiaceae |
|
Houstonia pusilla
| Schoepf | Reise Nordamer. Staat. 2: 306 | 1788 |
| Rubiaceae |
*
|
Houstonia pusilla
| J.F. Gmel. | Syst. Nat. 236 | 1791 |
| Rubiaceae |
|
Houstonia pusilla fo. albiflora
| Standl. | Rhodora 34(405): 177 | 1932 |
| Rubiaceae |
|
Houstonia pusilla fo. rosea
| Steyerm. | Rhodora 41(492): 585 | 1939 |