| Micranthes ferruginea (Graham) Brouillet & Gornall | |
| Publ. & Syn. | Brouillet & Gornall, J. Bot. Res. Inst. Texas 1: 1020 (2007). - Saxifraga ferruginea Graham, Edinburgh New Philos. J. 7: 349 (1829). Holotype (E): Canada. Garden material, grown 1829 in Edinburgh from seed collected by Dr. Richardson. - Spatularia ferruginea (Graham) Small, N. Amer. Fl. 22, 2: 150 (1905). |
| Notes | Micranthes ferruginea reaches the Borderline Arctic. The northernmost occurrence mapped by Porsild and Cody (1980) and Hultén and Fries (1986), on the eastern slope of the northern Mackenzie Mountains in the Northwest Territories, is within or close to the Arctic. |
| Chromosomes | (1) 20 (2x, x = 10). - Alaska, Canada (W), U.S.A. (W). - At least four reports. (2) 38 (4x, x = 10, aneuploid?). - Canada (W). - Five reports. Taylor and Mulligan (1968) doubted the reports of 2n = 38 by Beamish (1960, 1961), see their evaluation. Randhawa and Beamish (1968a, 1968b, 1972) repeated the reports. Brouillet and Elvander (2009a) accepted only 2n = 20. These authors, however, reported that plants with bulbils replacing flowers were more common in the southern part of the range of M. ferruginea, a phenomenon that could be associated with the higher chromosome number. |
| Geography | American Pacific: (CAN). |
| Distribution | N = S AN = b E = b [ key ] |
| Parent taxon | Micranthes Haw. |
| PAF ID | 500103 |