| Potentilla arenosa subspecies taxon nipharga | |
| Publ. & Syn. | Potentilla nipharga Rydb., N. Amer. Fl. 22: 332 (1908). Holotype (NY): Canada: the Northwest Territories, Fort Good Hope on the Mackenzie River, 1861-1862, leg. I.S. Onion et al. - Potentilla nivea var. nipharga (Rydb.) Soják, Candollea 44: 751 (1989). |
| Notes | Elven and Murray: Subspecies arenosa may consist of two taxa. The plants here named as Potentilla arenosa taxon nipharga differ in, e.g., many-flowered inflorescences, small flowers, and petioles with a dense understorey of curved hairs. There is no indication (yet) that taxon nipharga is a hybrid or hybrid species with any suggested parentage. The only small-flowered species in its regions is P. pulchella from which it differs in nearly every other diagnostic feature. Yurtsev (PAF proposal) reported taxon nipharga from Greenland, Canada, and tentatively from the Russian Far East. We have only seen it from northern Greenland and northeastern Canada (Ellesmere and Axel Heiberg islands). We refrain from formalizing the name as Rydberg's P. nipharga was described from a locality on the Mackenzie River, outside the currently accepted range, and may belong to another plant. |
| Chromosomes | (1) 28 (4x). - Siberia (N), Far East (N), Alaska. - Several reports, numerous counts. (2) 42 (6x). - Siberia (N), Far East (N). - Several reports, numerous counts. (3) 49 (7x). - Siberia (N), Far East (N). - At least three reports, several counts. (4) 56 (8x). - Siberia (N). - Zhukova and Petrovsky (1987b). (5) 70 (10x). - Siberia (S), Far East (N). - At least five reports, several counts. |
| Geography | North American (NE): CAN GRL. |
| Distribution | B = R C = R GW = r D = R EP = r GE = r [ key ] |
| Parent taxon | Potentilla arenosa (Turcz.) Juz. |
| PAF ID | 641039b |