| Draba sibirica (Pall.) Thell. | |
| Publ. & Syn. | Thell., Lepidium: 318 in nota 2 (1906). - Lepidium sibiricum Pall., Reise Russ. Reich. 3: 34 (1776). Described from Siberia. |
| Notes | Böcher (1974) distinguished between a large-grown subsp. sibirica from the Caucasus, southern Siberia, and the Altai and a small-grown subsp. arctica from northwestern Siberia, northern Russia, and Greenland. He cited several diagnostic differences. We accept the separation. All plants that reach the Arctic belong to subsp. arctica. |
| Chromosomes | (1) 64 (8x). - Far East (East Chukotka). - Zhukova and Petrovsky (1984). (2) 80 82 (10x). - Canada. - Mulligan (1966, 1970). Several counts. Not included: Four of the six reports cited for this species by Löve and Löve (1975a: as 2n = 80) must be rejected as they were published as belonging to other species by the original authors and are based on plants from far outside the known range of the Pacific D. borealis: from Svalbard and Greenland (Heilborn 1927, for D. hirta from northern Greenland; Flovik 1940, for D. cinerea, i.e., D. arctica from Svalbard; Jørgensen et al. 1958, for D. hirta from Greenland; Böcher 1966a, from Greenland). The Löves stated D. borealis to be amphi-Pacific; consequently, their treatment is absurd. |
| Geography | European (E) - Asian (N/C) & North American (Greenlandic, E). |
| Parent taxon | Draba L. |
| Child taxa |
Draba sibirica subsp. arctica Böcher |
| PAF ID | 672137 |