3309044 Carex krausei Boeck.
Distribution
Northern Iceland: Present only in the Borderline Arctic
Svalbard - Franz Joseph Land: Rare
Polar Ural - Novaya Zemlya: Scattered
Yamal - Gydan: Rare
Taimyr - Severnaya Zemlya: Rare
Anabar - Onenyo: Rare
Kharaulakh: Rare
West Chukotka: Scattered
East Chukotka: Scattered
Western Alaska: Scattered
Northern Alaska - Yukon: Frequent
Central Canada: Frequent
Hudson Bay - Labrador: Scattered
Ellesmere Island: Rare
Western Greenland: Scattered
Eastern Greenland: Scattered
Mid Arctic Tundra: Scattered
Southern Arcti Tundra: Frequent
Shrub Tundra: Frequent
Bordering boreal or alpine areas: Frequent
- Boeck., Bot. Jahrb. Syst. 7: 279 (1886). Lectotype (LE): Alaska: "Gebiet des Lynn-Canals, Sandinsel in Chilicot unterhalb Katkwälta", 17. June 1882, leg. A. and A. Krause 92 (Egorova 1999: 351). Holotype in B lost. An isotype selected as lectotype. - Carex capillaris subsp. krausei (Boeck.) Böcher, Meddel. Grønland 147, 9: 52 (1952).
- Carex capillaris var. major Drejer ex Blytt, Norges Fl. 1: 244 (1861). Holotype: Carex capillaris "var. major et robustior". Drejer, Fl. Dan. 14, 40: t. 2374, f. 3. 1843. - Carex capillaris var. robustior Drejer ex Lange, Consp. Fl. Groenland. 3: 148 (1890). Holotype: Greenland. Drejer, Fl. Dan. 14, 40: t. 2374, f. 3 and p. 9. 1843. - Carex capillaris subsp. robustior (Drejer ex Lange) Böcher, Meddel. Grønland 147, 9: 51-52 (1952). - Carex boecheriana Á. Löve, D. Löve & Raymond, Canad. J. Bot. 35: 748 (1957). Nomen novum for Carex capillaris var. robustior Drejer ex Lange.
- Carex capillaris var. porsildiana Polunin, J. Linn. Soc., Bot. 52: 373 (1943). Holotype (BM): Greenland: Igaliko Fjord, Gammel Qagssiarssuk, 07. Aug. 1937, N. Polunin 10,789. - Carex krausei subsp. porsildiana (Polunin) Á. Löve & D. Löve, Acta Horti Gothob. 20, 4: 175 (1956).
2n=
62. - Siberia (N), Far East (N). - Yurtsev and Zhukova (1978, 1982).
The only certain and vouchered chromosome number reports of C. krausei are the Russian ones of 2n = 62. The reliably vouchered reports suggest a slightly higher chromosome number in C. krausei than in C. capillaris.
Not included: Reports of 2n = 36 from Iceland (Löve and Löve 1956b), Manitoba (Löve and Löve 1981d), and Alaska (Löve et al. 1957), and of 2n = 56 from Manitoba (Löve et al. 1957; Löve and Löve 1981d), the last-mentioned ones as C. boecheriana. All these reports are dubious (read: improbable). Ball (2002b) discussed the variation in chromosome numbers but without sufficient skepticism concerning the Löve counts.
Geography: Circumpolar-alpine: (ICE) NOR RUS SIB RFE ALA CAN GRL.
Notes: Ball (2002b) applied the same synonymy for Carex krausei that we do. For the assignment of the names var. major and var. robustior to this species, see notes to C. capillaris.
Of the proposed subspecies, also discussed by Ball (2002b), subsp. krausei has been suggested to be Russian, Siberian, and widely amphi-Beringian (RUS SIB RFE ALA CAN) and to be replaced by subsp. porsildiana in the amphi-Atlantic regions (CAN GRL ICE NOR) and by C. boecheriana in parts of Greenland (but this entity is also reported from the Yukon Territory by Porsild and Cody 1980). We do not see much difference between Beringian and North Atlantic plants. If races are recognized, it is most probable that the plants in Iceland, Svalbard, and Greenland belong to subsp. porsildiana, whereas all those in the Beringian areas belong to subsp. krausei.
Higher Taxa
- Carex [3309,genus]