| Family | EUPHORBIACEAE |
| Genus species | Euphorbia melanadenia Torr. & A.Gray |
| Bibliography | Pacif. Railr. Rep. Whipple, Bot. [J.Torrey] 4(5; 4): 135 (1857) |
| Native Range | Arizona to s. California and Baja California |
| Primary Biome | Desert or Dry Shrubland |
| Habitat | dry, rocky slopes |
| Altitude | 400-1400m |
| Description | leaves opposite, ovate, 1-5mm, entire, rounded to acute, tomentose, cyathium single, involucre campanulate, tomentose |
| Size | 5-20cm |
| Color | white |
| Bloom | summer |
| Ca | |
| Type | perennial |
| Cultivation | sunny, dry, rock crevices, protection against winter wet alpine house, poor, drained soil, sun |
| Propagation | seed in winter, germ. 1-3 months, 18-21°C division in spring; cuttings in late spring and late summer |
| Synonyms | Anisophyllum melanadenium (Torr. & A.Gray) Klotzsch & Garcke Chamaesyce aureola Millsp. Chamaesyce melanadenia (Torr. & A.Gray) Millsp. Euphorbia cinerascens var. appendiculata Engelm. Euphorbia polycarpa var. appendiculata (Engelm.) Munz Euphorbia polycarpa var. vestita S.Watson |
| Territory | 7 Northern America 76 Southwestern U.S.A. (ARI Arizona, CAL California) 79 Mexico (MXN Mexico Northwest) |