Panarctic Flora

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641052 Potentilla crantzii (Crantz) Beck ex Fritsch

Distribution

Northern Iceland: Frequent
Northern Fennoscandia: Frequent
Kanin - Pechora: Frequent
Svalbard - Franz Joseph Land: Scattered
Polar Ural - Novaya Zemlya: Frequent
Yamal - Gydan: Rare
Hudson Bay - Labrador: Scattered
Western Greenland: Frequent
Eastern Greenland: Frequent
Mid Arctic Tundra: Scattered
Southern Arcti Tundra: Frequent
Shrub Tundra: Frequent
Bordering boreal or alpine areas: Frequent

2n= (1) 28 (4x). - Europe (C, S). - Several reports.
(2) 35 (5x). - Europe (C, SW). - Druskovic and Lovka (1995); Delgado et al. (2000).
(3) 41 42 (6x). - Europe (N, C), Russia (N, W), Greenland. - Numerous reports.
(4) 42-49 (6-7x). - Europe (British Isles). - Smith (1971).
(5) 48 49 (7x). - Europe (N, C). - Several reports.
Not included: A report of 2n = 14 (2x, Guinochet 1968) probably belongs to another species.

Geography: Amphi-Atlantic - European - Asian (W): ICE NOR RUS SIB CAN GRL.

Notes: Kamelin (2001) claimed that the priority name for this species should be Potentilla verna L. He did not designate a lectotype and the name P. verna has been applied to several different plants. According to Cafferty and Jarvis (2002a), the original material consists of P. crantzii (LINN 655.23), P. aurea (Haller 1740: t. 6, f. 4), P. grandiflora (UPS Herb. Burser XVIII (2):1), and an uncertain plant (LINN 655.24). To preserve current usage without formally rejecting the name P. verna, Cafferty and Jarvis (2002a) designated the Burser specimen as lectotype, making the name P. verna L. a synonym of P. grandiflora L. This process hopefully closes that question but there is a recent discussion (B. Ertter, J. Reveal, J. Soják) concerning whether the name P. verna can be re-typified and re-instated for a non-arctic species currently going by the name P. tabernaemontani. We hope not.

European P. crantzii is polymorphic, probably with a geographically structured variation, but this variation is poorly studied and probably independent of P. gelida. Yurtsev and Soják proposed P. scandica to be a hybrid species from P. crantzii and P. gelida subsp. boreo-asiatica. Yurtsev stated that the main area of this species is in the Scandinavian mountains, and its type is from high mountains in southern Norway. Soják's type specimen combines the ternate and quinate leaves typical of Scandinavian P. crantzii and is re-identified as such. The name thereby becomes a synonym of P. crantzii. Soják (1985a) restricted the range of P. scandica to Norway, Sweden, and Finland, fully outside the now accepted range of P. gelida subsp. boreo-asiatica. There may be hybridogeneous biotypes from crosses between P. crantzii and P. gelida in northeastern European Russia or northwestern Siberia but the name P. scandica is not available for these. As it now stands, Yurtsev only reported a possible hybrid species to reach the Arctic in Taimyr, well east of the acknowledged range of P. crantzii. We do not accept a hybrid species between P. crantzii and P. gelida without further documentation.

Higher Taxa