| Family | PLANTAGINACEAE |
| Genus species | Penstemon xylus A.Nelson sect. Caespitosi |
| Bibliography | Bot. Gaz. 34: 31 (1902) |
| Native Range | Utah |
| Primary Biome | Temperate |
| Habitat | rocky slopes |
| Altitude | 2100-3100m |
| Description | leaves whitish, hirsute, 6-16mm long, 3-4,5mm wide, obovate to spathulate, flowers 12-18mm, inflorescence few flowered, secund thyrsus, staminodium yellow |
| Size | 5-10cm |
| Color | dark bluish purple |
| Bloom | summer |
| Ca | |
| Type | subshrub |
| Cultivation | sunny rock crevices, protection against winter wet alpine house, poor, drained soil, sun |
| Propagation | seed in spring, barely covered, germ. 1-3 months, 13-18°C cuttings in late summer |
| Synonyms | Penstemon caespitosus ssp. suffruticosus (A.Gray) D.D.Keck Penstemon caespitosus var. suffruticosus A.Gray Penstemon tusharensis N.H.Holmgren |
| Territory | 7 Northern America 76 Southwestern U.S.A. (UTA Utah) |