| Family | FABACEAE |
| Genus species | Trifolium atrorubens (Greene) House trib. Trifolieae |
| Bibliography | Bot. Gaz. 41: 336 (1906) |
| Native Range | sw. California |
| Primary Biome | Temperate |
| Habitat | grassland |
| Altitude | 1100-3000m |
| Description | taproot, stems procumbent, leaflets shortly elliptic, obtuse, 2-6cm, floral heads minute, wider than high, calyx densely long white hirsute, flowers sessile |
| Size | 10-25cm |
| Color | deep red-purple |
| Bloom | summer |
| Ca | |
| Type | perennial |
| Cultivation | mesic, slightly humous, sunny site alpine house, moist, rich, drained soil, sun |
| Propagation | seed in spring, germ. 1-3 months, 13-18°C basal cuttings in late spring and late summer |
| Synonyms | Trifolium longipes var. atrorubens (Greene) Jeps. Trifolium longipes ssp. atrorubens (Greene) J.M.Gillett Trifolium longipes f. atrorubens (Greene) McDermott Trifolium rusbyi var. atrorubens Greene |
| Territory | 7 Northern America 76 Southwestern U.S.A. (CAL California) |