| Family | RUBIACEAE |
| Genus species | Houstonia tenuifolia Nutt. |
| Bibliography | Gen. N. Amer. Pl. 1: 287 (1818) |
| Native Range | ec. & se. USA |
| Primary Biome | Temperate |
| Habitat | steppes |
| Description | leaves opposite, sessile, narrowly lanceolate, entire, 1-4cm, inflorescence cymose, flowers numerous, 4-merous |
| Size | 15-30cm |
| Color | blue |
| Bloom | summer |
| Ca | |
| Type | subshrub |
| Cultivation | sunny site with a deep, drained soil alpine house, rich, drained soil, sun |
| Propagation | seed in spring, barely covered, germ. 1-3 months, 10-16°C cuttings in late summer |
| Synonyms | Chamisme tenuifolia (Nutt.) Nieuwl. Hedyotis longifolia var. tenuifolia (Nutt.) Torr. & A.Gray Hedyotis nuttaliana Fosberg Hedyotis purpurea var. tenuifolia (Nutt.) Fosberg Houstonia longifolia var. tenuifolia (Nutt.) Alph.Wood Houstonia purpurea var. tenuifolia (Nutt.) A.Gray Oldenlandia purpurea var. tenuifolia (A.Gray) ex Chapm. |
| Territory | 7 Northern America 74 North-Central U.S.A. (ILL Illinois) 78 Southeastern U.S.A. (ALA Alabama, FLA Florida, GEO Georgia, KTY Kentucky, MRY Maryland, TEN Tennessee, VRG Virginia) |