500111b Micranthes nelsoniana subsp. aestivalis (Fisch. & C.A. Mey.) Elven & D.F. Murray
Distribution
Polar Ural - Novaya Zemlya: Rare
Yamal - Gydan: Rare
Taimyr - Severnaya Zemlya: Rare
Anabar - Onenyo: Present only in the Borderline Arctic
Kharaulakh: Present only in the Borderline Arctic
Yana - Kolyma: Present only in the Borderline Arctic
West Chukotka: Rare
South Chukotka: Rare
Southern Arcti Tundra: Presence uncertain
Shrub Tundra: Rare
Bordering boreal or alpine areas: Frequent
- Elven & D.F. Murray, J. Bot. Res. Inst. Texas 2: 440 (2008). - Saxifraga aestivalis Fisch. & C.A. Mey., Index Sem. Hort. Petrop. 1: 37 (1835). Lectotype (LE): Siberia: the Altai, 1817, Herb. Fischer (see Siplivinsky 1976). - Micranthes aestivalis (Fisch. & C.A. Mey.) Small, N. Amer. Fl. 22, 2: 145 (1905). - Saxifraga nelsoniana subsp. aestivalis (Fisch. & C.A. Mey.) D.A. Webb, Feddes Repert. Spec. Nov. Regni Veg. 69: 154 (1964). - Micranthes nelsoniana var. aestivalis (Fisch. & C.A. Mey.) Gornall & H. Ohba, J. Bot. Res. Inst. Texas 1: 1020 (2007).
- Saxifraga punctata subsp. punctata auct.
2n=
(1) 28. - Siberia (S). - Malakhova (1971).
(2) 30. - Siberia (N). - Zhukova and Petrovsky (1987a).
(3) 56. - Siberia (S). - Malakhova (1971).
(4) ca. 60. - Siberia (S). - Belaeva and Siplivinsky (1976).
(5) 32 48 56 60 ca. 88. - Herbarium NS/NSK (collectors: Krogulevich, Belaeva, Zhukova).
Geography: Asian (N/C): RUS SIB RFE.
Notes: Zhmylev: Subspecies aestivalis is a mainly southern arctic to montane Siberian race characterized by slightly pubescent inflorescence with more spreading branches, and leaves with not more than 15 threecornered teeth. However, near its northern border it is hard to distinguish this subspecies from subsp. nelsoniana because of its stocky appearance. Moreover, transition forms are often found in regions of joint occurrence.
Higher Taxa
- Micranthes nelsoniana [500111,species]