630603 Oxytropis czukotica Jurtz.
Distribution
Yana - Kolyma: Rare
West Chukotka: Frequent
Wrangel Island: Frequent
South Chukotka: Frequent
East Chukotka: Frequent
Western Alaska: Rare
Northern Alaska - Yukon: Presence uncertain
Mid Arctic Tundra: Scattered
Southern Arcti Tundra: Frequent
Shrub Tundra: Frequent
Bordering boreal or alpine areas: Frequent
- Jurtz., Byull. Moskovsk. Obshch. Isp. Prir., Otd. Biol. 85, 6: 102 (1980). Holotype (LE): Russian Far East: West Chukotka, "Chaunskoi gubi .. Pevek ...", 20. June 1965, leg. B. Yurtsev, V. Petrovsky, and P. Zhukova.
- Oxytropis tschuktschorum auct., non Jurtz., Bot. Zhurn. 53: 1538 (1968).
2n=
32 (4x). - Siberia (N), Far East (N). - Numerous reports, close to 50 counts, mainly for O. tschuktschorum.
Not included: Two reports of 2n = 16 (2x) from northeastern Asia (Gurzenkov and Pavlova 1984; Pavlova et al. 1989), both for O. czukotica. Both Zhukova (1983) and Yurtsev (PAF proposal) reported O. czukotica to be uniformly tetraploid (2n = 32).
Geography: Amphi-Beringian (W): SIB RFE ALA.
Notes: Yurtsev: The only locality for Oxytropis czukotica in North America is Ogotoruk Creek at Cape Thompson in northwestern Alaska.
Elven and Murray: However, Yurtsev did annotate three specimens from the Seward Peninsula and one from the Brooks Range as O. czukotica. We agree with Yurtsev's identifications of these specimens and have added 1-2 more specimens. Occurrence of this species in western and northern Alaska is not surprising. Oxytropis czukotica is very frequent in East Chukotka, almost within sight of western Alaska.
Yurtsev considered the diploid Asian Pacific O. pumilio a possible immediate ancestor of O. czukotica. Oxytropis pumilio was, however, proposed kept outside this aggregate by Yurtsev.
Higher Taxa
- Oxytropis [6306,genus]