| Family | RUBIACEAE |
| Genus species | Houstonia rubra Cav. |
| Bibliography | Icon. 5: 48 (1779) |
| Native Range | se. Utah to w. Texas and c. Mexico |
| Primary Biome | Subtropical |
| Habitat | sandy grassland |
| Description | leaves opposite, carnose, linear, crowded in short erect tuft, flowers 15-20mm, with long slender tube and 4 flat lobes |
| Size | 5-10cm |
| Color | pinkish violet, white |
| Bloom | late spring |
| Ca | |
| Type | subshrub |
| Cultivation | sunny site with a poor, sandy soil alpine house, sandy soil, sun |
| Propagation | seed in spring, barely covered, germ. 1-3 months, 10-16°C cuttings in late summer |
| Synonyms | Hedyotis rubra (Cav.) A.Gray Houstonia saxicola Eastw. Oldenlandia rubra (Cav.) A.Gray |
| Territory | 7 Northern America 76 Southwestern U.S.A. (ARI Arizona, UTA Utah) 77 South-Central U.S.A. (NWM New Mexico, TEX Texas) 79 Mexico (MXC Mexico Central, MXE Mexico Northeast, MXG Mexico Gulf, MXN Mexico Northwest) |