Spanned sedge ( lat. Carex extensa ) is a perennial herbaceous species of the genus Osok ( Carex ) of the family Osokovye ( Cyperaceae ).
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Content
Botanical description
2 - Carex extensa
Gray-green plant with a dense-soddy rhizome .
Stems stupid-triangular, smooth, 10-50 cm tall [2] .
The leaf blades are rigid, straight, thickened, grooved, 2-3 mm wide, smooth, bristly-thinned, almost equal to the stems.
Spikelets in the number of 3-5, crowded above, set down. Upper conical spikelet, linear, 1–2.5 cm long [2] , with ovate, sharp and rusty scales; the rest are pistillate , close together or lower sometimes can be set aside, ovate, spherical or oblong-ovate, 0.6–1.5 (2) cm long, thick, upper sessile, lower at the stem up to 1 cm long, with ovate, at the top is spiny-pointed, rusty-speckled, narrowly webbed along the edge, with yellowish scales shorter than the sacs in the middle. Oviform pouches, (2.7) 3-3.5 (4) mm long, flat-triangular, gray-green, slightly rusty-speckled, later turning brown, with 6-7 veins , round at the base, sessile, with a smooth wedge-shaped short-bicuspid spout. The lower covering leaf without a vagina or with a vagina of 0.3-1 (2) cm in length (and the stronger the lower pistillate spikelet is set aside from the other spikelets, the longer the vagina of its leaf) and the long plate (1.5) 3 times the inflorescence.
Fruits in June — July.
The number of chromosomes is 2n = 60.
The species is described from southern England .
Spread
Northern Europe (South), Central Europe (North), Atlantic and Southern Europe; Baltic states : Estonia ; European part of Russia : Black land; Moldova : south; Ukraine : Crimea ; Caucasus : the coast of the Kerch Strait , the neighborhood of Makhachkala and Kaspiysk , Anapa and Novorossiysk , the Sara Peninsula; North America (alien); North Africa ; South Africa (offshore).
It grows on saline sandy places along the sea coasts.
Notes
- ↑ On the conditionality of specifying the class of monocotyledons as a higher taxon for the group of plants described in this article, see the “APG Systems” section of the article “Monocotyledons” .
- ↑ 1 2 Krechetovich V.I. Genus 235. Carex - Carex // Flora of the USSR : in 30 t. / Ch. ed. V.L. Komarov . - L .: Publishing House of the Academy of Sciences of the USSR , 1935. - T. 3 / ed. volume B. K. Shishkin . - pp. 396–397. - 636, XXV with. - 5175 copies (Checked April 15, 2010)
Literature
- Egorova T.V. The sedges (Carex L.) of Russia and adjacent states (within the former USSR) . - St. Petersburg, St. Louis: St. Petersburg State Technical Academy of Agriculture and the Missouri Botanical Garden, 1999. - p. 267-268. - 772 s.
- Krechetovich V.I. Genus 235. Osok - Carex // Flora of the USSR : in 30 t. / Ch. ed. V.L. Komarov . - L .: Publishing House of the Academy of Sciences of the USSR , 1935. - T. 3 / ed. volume B. K. Shishkin . - pp. 396–397. - 636, XXV with. - 5175 copies