| Family | BRASSICACEAE |
| Genus species | Physaria calderi (G.A.Mulligan & A.E.Porsild) O´Kane & al. |
| Bibliography | Novon 12: 322 (2002) |
| Native Range | Subarctic America |
| Primary Biome | Subarctic |
| Habitat | rocks |
| Altitude | 600-1500m |
| Description | taproot, basal leaves silvery green, densely pubescent, broadly ovate, stem leaves lanceolate, sessile, flowers in dense raceme, petals 6-10mm, silicles spherical or elipsoid |
| Size | 10-20cm |
| Color | yellow |
| Bloom | spring |
| Ca | + |
| Type | perennial |
| Cultivation | rock crevices with favourable water regime, eastern slopes alpine house, poor, drained soil, shading in summer |
| Propagation | seed in spring, barely covered, germ. 1 month, 10-16°C cuttings of rosettes in late summer |
| Synonyms | Lesquerella arctica ssp. calderi (G.A.Mulligan & A.E.Porsild) Hultén Lesquerella calderi G.A.Mulligan & A.E.Porsild |
| Territory | 7 Northern America 70 Subarctic America (ASK Alaska, NWT Northwest Territories, YUK Yukon) |