Houstonia angustifolia
Houstonia purpurea  var. purpurea
Angiosperms | Gentianales | Rubiaceae | Houstonia | Houstonia purpurea | Houstonia purpurea  var. purpurea
| Juss. ex Bercht. & J. Presl | Juss. | Gronov. | L. |