Carex nardina (lat.) - a herbaceous plant, a species of the sedge genus ( Carex ) of the sedge family ( Cyperaceae ).
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Carex nardina Fr. , 1839 | |||||||||||||||||||||||||
Content
Botanical Description
The rhizome is densely soddy.
The stems are smooth, straight, 2-22 cm tall [2] , at the base, dressed in dark brown vaginas .
Leaves are straight or possibly sickle-curved, equal to or longer than the stem, stubble-folded.
Spikelet androgynous, ovate or oblong-ovate, 0.5-1 cm long. Scales are ovoid, blunt, brown or chestnut, with a narrow bright edge. The bags are flat-convex, obovate or elliptical, finely membranous, (3) 3.5-4 mm long, mature pressed, without veins , on a short or elongated wedge-shaped leg, with a short, whole or slightly notched nose, along the nose and along the edge to the middle rough. Stigma 2.
Fruit at the base with an axial appendage.
The number of chromosomes is 2n = 70.
The view is described from North America.
Distribution
Northern Europe : Iceland , Norway , Sweden ; The Arctic part of Russia : Wrangel Island , Chukchi Land ( Kuvet River, Chegitun River and Arakamchechen Island ); North America : western mountains, subarctic regions, Svalbard , Hudson's Bay , Labrador , the Arctic part of Alaska , the extreme east of the Arctic coast of Canada , the Canadian Arctic archipelago , all of Greenland (to the northern end).
It grows on dry stony, mostly limestone slopes.
Systematics
Within the species, two varieties are distinguished [3] :
- Carex nardina var. hepburnii ( Boott ) Kük. - Sedge Hepburn; Arctic Far East , North America
- Carex nardina var. nardina - Northern Europe, from subarctic America to Canada
Krechetovich V.I. and Egorova T.V. variety Carex nardina var. hepburnii ( Boott ) Kük. stands out in a separate form Carex hepburnii Boott . From Carex nardina Fr. it differs in wider, 1.5-2 mm wide, elliptical sacs with a short, unclearly pronounced pedicle, sharply narrowed into a short 0.2-0.3 mm spout (in Carex nardina Fr., the sacs are narrower, 1.4- 1.6 mm wide, mostly ovoid, with an elongated, sharply delimited pedicle, gradually narrowed into a longer nose, about 0.5 mm).
Notes
- ↑ For the conventionality of indicating the class of monocotyledons as a superior taxon for the plant group described in this article, see the APG Systems section of the Monocotyledonous article .
- ↑ Krechetovich V.I. Genus 235. Sedge - Carex // Flora of the USSR : in 30 tons / chap. ed. V.L. Komarov . - L .: Publishing House of the Academy of Sciences of the USSR , 1935. - T. 3 / ed. volumes B.K. Shishkin . - S. 187. - 636, XXV p. - 5175 copies.
- ↑ Carex nardina in the database of Botanic Gardens in Kew, United Kingdom (Retrieved May 9, 2010)
Literature
- Egorova T.V. Sedges (Carex L.) of Russia and neighboring states (within the former USSR) . - St. Petersburg, St. Louis: St. Petersburg HCFA and the Missouri Botanical Garden, 1999. - S. 598-599. - 772 p.
- Arctic flora of the USSR. Vol. III / Comp. T.V. Egorova, V.V. Petrovsky, A.I. Tolmachev, V.A. Yurtsev; Ed. A.I. Tolmacheva. - L .: Nauka, 1966. - S. 69-70.
- Krechetovich V. I. Genus 235. Sedge - Carex // Flora of the USSR : in 30 tons / chap. ed. V.L. Komarov . - L .: Publishing House of the Academy of Sciences of the USSR , 1935. - T. 3 / ed. volumes B.K. Shishkin . - S. 187. - 636, XXV p. - 5175 copies.