| Cerastium regelii subsp. caespitosum (Malmgren) Tolm. | |
| Publ. & Syn. | Tolm., Fl. Arct. URSS 6: 41 (1971). - Cerastium alpinum var. caespitosum Malmgren, Öfvers. Förh. Kongl. Svenska Vetensk.-Akad. 19: 242 (1862). Described from Svalbard (Norway). |
| Notes | Hultén (1956, 1958) mapped his Cerastium regelii (i.e., this subspecies) from Banks Island in the westernmost Canadian Arctic Archipelago eastwards across Greenland and the arctic European islands to Taimyr. Tolmachev (1971a) restricted the range in Russia to Franz Joseph Land, Novaya Zemlya, and Polar Ural. We here follow Tolmachev. Local co-occurrence with subsp. regelii without transitions has been observed in northern Banks Island. |
| Chromosomes | 72 (4x). - Europe (N), Canada, Greenland. - At least five reports. Not included: A report of 2n = 82-86 (Böcher 1977) may belong to the common hybrid C. arcticum x regelii (subsp. caespitosum). |
| Geography | North American (N) - amphi-Atlantic - European (N): NOR RUS CAN GRL. |
| Distribution | N = R A = F B = F C = F D = F E = S CC = f YG = ? HL = s EP = f UN = f GE = f SF = f Tm = s [ key ] |
| Parent taxon | Cerastium regelii Ostenf. |
| PAF ID | 420211b |