Eriophorum


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Related to Eriophorum: Common Cottongrass

Eriophorum

 

(cotton grass), a genus of plants of the family Cyperaceae. The plants are perennial herbs with a creeping or shortened rhizome. Those plants having the latter type of rhizome form small tussocks. The stems are three-angled or cylindrical. The basal leaves are long, and the stem leaves are short or reduced in the form of sheaths. The bisexual flowers are borne by many-flowered spikelets, which are solitary or gathered in umbellate clusters. The perianth consists of numerous white or, less commonly, rusty hairs, which greatly elongate and become cottony after flowering. The fruit is three-angled.

There are approximately 20 species of cotton grass, distributed in the cold and temperate belts of the northern hemisphere. One species grows in the southern hemisphere, in the Transvaal. There are 14 species in the USSR, growing mainly in the arctic and forest zones and in the alpine belt of the mountains. The plants usually grow along shores and in swamps, boggy tundra, and forests. Among the most common is the hare’s-tail (E. vaginatum), which often forms broad tussocks in upriver swamps. E. polystachion and the broad-leaved cotton grass (E. latifolium) grow mainly in downriver swamps and peaty lands covered with spring water. All species of cotton grass form peat. Many species, especially hare’s-tail, are valuable early-spring forage for deer and elks. The stalks are eaten by waterfowl.

T. V. EGOROVA

References in periodicals archive ?
Rhizomatous perennial graminoids, including the grass Dupontia fischeri (Fisher's tundragrass) and the hydrophytic sedges Carex aquatilis (water sedge), Eriophorum angustifolium (tall cottongrass), and E.
In central parts Eriophorum vaginatum, Marchantia polymorpha, and Pohlia nutans and in marginal parts Bryum spp.
Leaf exsertion, leaf elongation, and leaf senescence in Eriophorum vaginatum and Carex bigelowii in northern Alaska.
Floral ontogeny in Scirpus, Dulichium and Eriophorum (Cyperaceae), with special reference to the perianth.
More recently PITARCH (2002: 261) proposed a Maestracensean association for Eriophorum latifolium fens in the southeastern Iberian System, under the name Epipactido palustris-Eriophoretum latifolii and framed into Molinion caeruleae (Molinio-Arrhenatheretea).
There was a slight, but nonsignificant, trend toward greater plant cover in the warmed plots, especially that contributed by Eriophorum angustifolium.
The vegetation at all three sites was dominated by rhizomatous sedges, mostly Carex and Eriophorum species.
Among published records and revised materials, Carex achenes were identified as those cyperaceous fruits that: (1) were found in unequivocal association with utricles; and/ or displayed (2) utricle remains at the achene base or, when they did not, then did not display any remains of perianth bristles either (as in Eriophorum L.
Tundra communities characterized by sedges (Carex and Eriophorum spp.
Circo del Mampodre (Marana), 30TUN230671, comunidad turbicola encharcada con Carex rostrata y Eriophorum latifolium, 1447 m, 16-VII-2007, F.
Tussock-shrub (Eriophorum vaginatum) and lowshrub (Salix planifolia, Betula nana) communities occur on the slopes of rolling hills, and wet-graminoid communities (Carex aquatilis, Eriophorum angustifolium) dominate poorly drained flat areas (Bliss 1981).
Over 80 of these species are disjunct from open peatlands in boreal or northeastern North American, including Aster junciformis, Betula pumila, Carex sterilis, Epilobium strictum, Eriophorum angustifolium, Galium labradoricum, Gentiana procera, Lobelia kalmii, Menyanthes trifoliata, Mimulus glabratus var.