| Family | RUBIACEAE |
| Genus species | Houstonia longifolia Gaertn. |
| Bibliography | Fruct. Sem. Pl. 1: 226 (1788) |
| Native Range | Canada to c. & e. USA |
| Primary Biome | Temperate |
| Habitat | steppes |
| Description | stems numerous, leaves opposite, sessile, linear-oblong, 1-3cm long, at base with small, whitish or purple bracts, flowers numerous in cyme, corolla tetramerous |
| Size | 15-25cm |
| Color | purple, whitish |
| 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 longifolia (Gaertn.) Nieuwl. Hedyotis longifolia (Gaertn.) Hook. Hedyotis purpurea var. longifolia (Gaertn.) Fosberg Houstonia longifolia var. glabra Terrell Houstonia longifolia var. musci B.Boivin Houstonia longifolia var. soperi B.Boivin Houstonia purpurea var. longifolia (Gaertn.) A.Gray Oldenlandia purpurea var. longifolia (Gaertn.) A.Gray |
| Territory | 7 Northern America 71 Western Canada (ABT Alberta, MAN Manitoba, SAS Saskatchewan) 72 Eastern Canada (ONT Ontario) 74 North-Central U.S.A. (ILL Illinois, MIN Minnesota, MSO Missouri, OKL Oklahoma, WIS Wisconsin) 75 Northeastern U.S.A. (INI Indiana, NWY New York, VER Vermont, WVA West Virginia) 77 South-Central U.S.A. (TEX Texas) 78 Southeastern U.S.A. (ALA Alabama, ARK Arkansas, GEO Georgia, KTY Kentucky, MRY Maryland, MSI Mississippi, NCA North Carolina, VRG Virginia) |