641021 Potentilla czegitunica Jurtz.
Distribution
East Chukotka: Rare
Shrub Tundra: Rare
- Jurtz., Fl. Arct. URSS 9, 1: 319, 196 (1984). Holotype (LE): Russian Far East: East Chukotka, "Peninsulae Tschukotskij pars boreali-orientalis, ad ripam sinistram fl. Czegitun prope ostium fl. Putukuneiveem", 23. July 1972, leg. B. Yurtsev.
Geography: Asian Beringian: RFE.
Notes: Elven and Murray: Yurtsev assumed Potentilla czegitunica to be a hybrid species from P. anachoretica, ?P. nivea s. lat., and either P. uniflora or P. subvahliana. This assumption was repeated by Soják (2004).
Yurtsev: Potentilla czegitunica is by no means a primary and unique hybrid. It is one of the most massive frequent? plants in the canyons of Czegitun River and two of its tributaries, on limestone rocks rich in relic species. The original combination of characters does not permit to choose two direct parents among the plants of the canyons. There is no strong indication that P. anachoretica is one parent: leaves ternate or digitate (not semidigitate) except for deeply dissected leaflets with parallel segments (flabellate leaflets in the P. uniflora aggregate). The combination of hair types is as in the P. uniflora aggregate but the lower side of the leaflets bears, beside crispate hairs, an admixture of floccose ones (as in P. nivea and P. arenosa).
Elven and Murray: May still be candidate for a local agamic biotype rather than a species.
Higher Taxa
- Potentilla [6410,genus]