| Family | ROSACEAE |
| Genus species | Petrophytum caespitosum (Nutt.) Rydb. |
| Synonyms | Spiraea caespitosa Nutt. |
| Eriogyne caespitosa (Nutt.) Watson | |
| Petrophytum elatius (S.Watson) A.Heller | |
| Habitat | rocks |
| Altitude | 1100-3000m |
| Description | leaves spathulate to oblanceolate, 7-14mm, uninerved, on both faces grey-green, raceme densely crowded, spicate, 2-5cm long, petals ca. 1mm long |
| Size | 5-10cm |
| Color | white |
| Bloom | summer |
| Ca | ind |
| Type | subshrub, cushion |
| Cultivation | sunny, dry, rock crevices, protection against winter wet alpine house, poor, drained soil, sun |
| Propagation | seed in winter, germ. 1-3 months, 16-18°C cuttings in late summer |
| Territory |
Northern America
Northwestern U.S.A. (Colorado , Idaho , Montana , Oregon , Wyoming ) North-Central U.S.A. (South Dakota ) Southwestern U.S.A. (Arizona , California , Nevada , Utah ) South-Central U.S.A. (New Mexico , Texas ) Mexico (Mexico Northeast) |
| Bibliography | Plants of the World online powo.science.kew.org International Plant Names Index www.ipni.org |
| Comments | ROSACEAE
caespitosum acuminatum (Rydb.) Munz, Aliso 4: 92 (1958)
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