641056 Potentilla pulviniformis A.P. Khokhr.
Distribution
Taimyr - Severnaya Zemlya: Rare
Kharaulakh: Rare
West Chukotka: Scattered
Wrangel Island: Rare
East Chukotka: Rare
Mid Arctic Tundra: Rare
Southern Arcti Tundra: Scattered
Shrub Tundra: Scattered
Bordering boreal or alpine areas: Presence uncertain
- A.P. Khokhr., Bot. Zhurn. 65: 1254 (1980). Holotype (MHA): Russian Far East: the Magadan area, "distr. Omolonensis, 140 km ad austroorientem ab opp. Omolon, in systemate fluminis Kegali, in cursu medio fluminis Avlandja", 05. Aug. 1976, leg. A.P. Khokhrjakov.
2n=
(1) 42 (6x). - Far East (West Chukotka). - Zhukova and Petrovsky (1985b, two counts).
(2) 49 (7x). - Far East (Wrangel Island). - Zhukova and Petrovsky (1985b).
(3) 56 (8x). - Far East (South Chukotka). - Zhukova and Petrovsky (1985b).
Geography: Asian (N) - Asian Beringian: SIB RFE.
Notes: Yurtsev: Distinctiveness of this old alpine pulvinate species of northeastern Asia regarding the arctic Potentilla hyparctica got additional confirmation in data of Eriksen and Yurtsev (1999) on the ultrastructure of straight hairs on leaves and petioles, verrucose in P. hyparctica vs. smooth in P. pulviniformis.
Elven and Murray: As to the hairs, those in Svalbard and Greenland P. hyparctica are smooth, not verrucose (see Hamre 2000). These plants obviously do not belong to P. pulviniformis in the Russian meaning. They show that there is a variation in hair structure that goes across the taxa proposed by Yurtsev. However, we accept P. pulviniformis on other morphological features.
Higher Taxa
- Potentilla [6410,genus]