| Caltha palustris subsp. radicans (T.F. Forst.) Syme | |
| Publ. & Syn. | Caltha arctica R. Br., Chlor. Melvill.: 7 (1823). Type (BM): Canada: the Northwest Territories, Cape Parry. - Caltha palustris var. arctica (R. Br.) Huth, Helios 9: 18 (1892). - Caltha palustris subsp. arctica (R. Br.) Hultén, Ark. Bot., n. s., 7, 1: 56 (1968). - Caltha minor subsp. arctica (R. Br.) Á. Löve & D. Löve, Bot. Not. 128: 510 (1976). |
| Notes | Piirainen (2001) accepted two subspecies of Caltha palustris in northwestern Europe: subsp. palustris and subsp. radicans (= subsp. arctica). When the small-flowered, low-grown, and rooting plants in the European mountains are merged with the arctic plants, the names C. radicans 1807, subsp. radicans 1863, and var. radicans 1886 have priority before the more well-known names C. arctica 1823, subsp. arctica 1968, and var. arctica 1892. Subspecies radicans is the main arctic race of Caltha and is very widespread but absent from northeastern North America and Greenland. |
| Chromosomes | (1) 28 (4x, x = 7). - Europe (N), Far East (N). - At least three reports for "palustris" and "sibirica". Reports of this number were 'corrected' by Löve and Löve (1975a) to 2n = 32. (2) 32 (4x, x = 8). - Europe, Russia, Siberia, Far East, Alaska, Canada. - Numerous reports for "arctica", "palustris", and "sibirica". (3) 48 (6x, x = 8). - Europe (N). - Löve and Löve (1948, for C. radicans). (4) 52 54 56 (8x, x = 7). - Europe, Russia, Siberia, Far East, Alaska, Canada. - Numerous reports for "arctica", "palustris", "radicans", and "sibirica". (5) 60. - Siberia, Canada. - Several reports for "arctica" and "palustris". (6) 64 (8x, x = 8). - Siberia, Far East. - At least two reports for "palustris" and "sibirica". (7) 70 72 80 (9-10x, x = 7, 8). - Siberia, Far East (N), Alaska. - At least four reports for "minor", "palustris", and "sibirica". There are several reports of a wide range of numbers within restricted areas, e.g.: Löve and Löve (1956b, 2n = 48-80 for C. minor in Iceland); Johnson and Packer (1968, 2n = 56-70 for C. palustris s. lat. in northwestern Alaska); Chrtková and Jarolímová (1999, 2n = 32 34 34-36 44 47 56 56+6B 57 56-59 59 61 64 for C. palustris in Europe). |
| Geography | European (N) - Asian (N) - amphi-Beringian - North American (NW): ICE NOR RUS SIB RFE ALA CAN. |
| Distribution | N = F AN = f AO = s C = R D = F Ic = f E = F CC = f WI = f YG = s FN = f CE = f CS = r UN = f YK = s AW = f Kh = f CW = f Tm = f KP = f [ key ] |
| Parent taxon | Caltha palustris L. |
| PAF ID | 360101b |