Houstonia angustifolia
Stenaria nigricans  var. nigricans
Angiosperms | Gentianales | Rubiaceae | Stenaria | Stenaria nigricans | Stenaria nigricans  var. nigricans
| Juss. ex Bercht. & J. Presl | Juss. | (Raf.) Terrell | (Lam.) Terrell |