| Family | RUBIACEAE |
| Genus species | Houstonia purpurea L. |
| Bibliography | Sp. Pl. 1: 105 (1753) |
| Native Range | c. & e. USA |
| Primary Biome | Temperate |
| Habitat | grassland |
| Description | stems erect, leaves large, ovate, flowers in terminal or lateral panicles, flowers 1cm long |
| Size | 10-40cm |
| Color | lilac, red |
| Bloom | summer |
| Ca | |
| Type | subshrub |
| Cultivation | mesic, slightly humous, sunny site alpine house, moist, rich, drained soil, sun |
| Propagation | seed in spring, barely covered, germ. 1-3 months, 10-16°C cuttings in late summer |
| Synonyms | Anotis ciliolosa G.Don Anotis lanceolata DC. Anotis longifolia G.Don Anotis purpurea (L.) G.Don Chamisme pupurea (L.) Nieuwl. Dioda frankii Steud. & Hochst. ex C.Presl Hedyotis caroliniana Raeusch Hedyotis ciliolata Torr. ex Spreng Hedyotis frankii C.Presl Hedyotis nigricans var. rigidiuscula (A.Gray) Shinners Hedyotis purpurea (L.) Torr. & A.Gray Hedyotis purpurea f. albiflora (Standl.) Fosberg Hedyotis purpurea f. leucantha (Standl.) Fosberg Hedyotis purpurea f. pubescens (Britton) Fosberg Hedyotis umbellata Walter Houstonia angustifolia Pursh Houstonia angustifolia var. rigidiuscula A.Gray Houstonia lanceolata f. albiflora Standl. Houstonia latifolia Willd. Houstonia macrosepala Nutt. Houstonia pubescens Raf. Houstonia purpurea var. pubescens Britton Houstonia purpurea f. pubescens (Britton) Fernald Houstonia rigidiuscula (A.Gray) Wooton & Standl. Houstonia rupestris Raf. Houstonia tenuifolia f. leucantha Standl. Houstonia umbellata Walp. Houstonia varians Michx. Knoxia purpurea (L.) Lam. ex Poir. Oldenlandia purpurea (L.) A.Gray Oldenlandia purpurea var. ciliolata (Torr. ex Spreng.) A.Gray Spermacoce lanceolata Frank ex C.Presl |
| Territory | 7 Northern America 74 North-Central U.S.A. (ILL Illinois, MSO Missouri, OKL Oklahoma) 75 Northeastern U.S.A. (INI Indiana, OHI Ohio, PEN Pennsylvania, VER Vermont, WVA West Virginia) 77 South-Central U.S.A. (TEX Texas) 78 Southeastern U.S.A. (ALA Alabama, ARK Arkansas, DEL Delaware, GEO Georgia, KTY Kentucky, LOU Louisiana, MRY Maryland, MSI Mississippi, NCA North Carolina, SCA South Carolina, TEN Tennessee, VRG Virginia) |