| Family | SAXIFRAGACEAE |
| Genus species | Micranthes lyallii (Engl.) Small sect. Calthophyllum |
| Bibliography | N. Amer. Fl. [N.L.Britton & al., eds.] 22: 143 (1905) |
| Native Range | Alaska to nw. USA |
| Primary Biome | Subalpine |
| Habitat | shady rocks |
| Altitude | 800-4000m |
| Description | leaves petiolate, spathulate to obovate, thin, serrate to dentate, sparsely glandular ciliate, adaxially glabrous, abaxially sparsely brown hirsute, flowers in lax thyrsus |
| Size | 15-30cm |
| Color | white |
| Bloom | spring, early summer |
| Ca | |
| Type | subshrub |
| Cultivation | shady, humous, rock crevices alpine house, humous, gravelly soil, shade |
| Propagation | seed in winter, barely covered, germ. 1-3 months, 16-21°C cuttings in late summer |
| Synonyms | Micranthes lyallii ssp. hultenii (Calder & Saville) Elven & D.F.Murray Saxifraga dahurica Lyall ex Engl. Saxifraga davurica Torr. & A.Gray Saxifraga lyallii Engl. Saxifraga lyallii var. hultenii Calder & Saville Saxifraga lyallii ssp. hultenii (Calder & Saville) Calde & Roy L.Taylor Saxifraga lyallii var. laxa Engl. |
| Territory | 7 Northern America 70 Subarctic America (ASK Alaska, NWT Northwest Territories, YUK Yukon) 71 Western Canada (ABT Alberta, BRC British Columbia) 73 Northwestern U.S.A. (IDA Idaho, MNT Montana, WAS Washington) |