| Family | SAXIFRAGACEAE |
| Genus species | Micranthes porsildiana (Calder & Saville) Elven & D.F.Murray sect. Calthophyllum |
| Bibliography | J. Bot. Res. Inst. Texas 2: 440 (2008) |
| Native Range | e. Siberia to Russian Far East, Subarctic America to w. Canada |
| Primary Biome | Subalpine or Subarctic |
| Habitat | alluvial gravel |
| Altitude | 0-2500m |
| Description | leaves thin, not carnose, 12-18-dentate, orbiculate, cordate, glabrous, flower few in compact inflorescence, sepals ovate-lanceolate, petals ovate or oblong, 3mm |
| Size | 10-25cm |
| Color | white |
| Bloom | summer |
| Ca | |
| Type | perennial |
| Cultivation | gravelly, humous, moist, sunny site alpine house, moist, humous, gravelly soil, sun |
| Propagation | seed in winter, barely covered, germ. 1-3 months, 16-21°C division after flowering; cuttings in late summer |
| Synonyms | Micranthes nelsoniana var. pacifica (Hultén) Gornall & H.Ohba Micranthes nelsoniana var. porsildiana (Calder & Saville) Gornall & H.Ohba Saxifraga nelsoniana var. pacifica (Hultén) H.Ohba Saxifraga nelsoniana ssp. pacifica (Hultén) Hultén Saxifraga nelsoniana ssp. porsildiana (Calder & Saville) Hultén Saxifraga nelsoniana var. porsildiana (Calder & Saville) H.Ohba Saxifraga pacifica (Hultén) Zhmylev & V.V.Petrovsky Saxifraga porsildiana (Calder & Saville) Jurtzev & V.V.Petrovsky Saxifraga punctata var. paciifica (Hultén) S.L.Welsh Saxifraga punctata ssp. pacifica Hultén Saxifraga punctata ssp. porsildiana Calder & Saville Saxifraga punctata var. porsildiana (Calder & Saville) B.Boivin |
| Territory | 3 Asia-Temperate 30 Siberia (YAK Yakutskiya) 31 Russian Far East (KAM Kamchatka, MAG Magadan) 7 Northern America 70 Subarctic America (ALU Aleutian Is., ASK Alaska, NUN Nunavut, NWT Northwest Territories, YUK Yukon) 71 Western Canada (ABT Alberta, BRC British Columbia) |