Holcus


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Related to Holcus: Holcus lanatus, Holcus mollis
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Holcus

 

a genus of plants of the family Gramineae. The biflorate spikes are gathered into more or less paniculate inflorescences; one flower is bisexual and awnless, and the other is staminate and has an awn.

Eight species thrive in Eurasia and North Africa (including the Canary Islands), and one species is found in South Africa (the Cape region). In the USSR there are three species. Common velvet grass (H. lanatus) is found most frequently in dry meadows and mountain slopes in the central, western, and southern regions of the European part of the USSR and in the Caucasus. German velvet grass (H. mollis) grows in dry meadows and thickets, mainly in the western regions of the European part of the USSR. Both species are perennials. The annual bristly velvet grass (H. setosus) is found in the coastal sands of Talysh (Caucasus). Holcus has a large mass of verdure, but when cattle eat large quantities of it they may become ill because of the downy nature of the leaves. Holcus contains glycoside, which forms toxic substances when it decomposes.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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References in periodicals archive ?
Adaptation to acidic soil is achieved by increased numbers of cis-acting elements regulating ALMT1 expression in Holcus lanatus.
It is apparent that the occurrence of perennial mesophilous species (Cynosurus cristatus, Holcus lanatus, Lolium perenne, Phleum pratense, Plantago lanceolata etc.) in the Dasypyrum villosum grasslands developed on deep and moist soils could suggest classification in the Molinio-Arrhenatheretea.
The meadows consisted of forbs (for example, Triteleia ixioides, Lewisia nevadensis, Rumex salicifolius, Achillea lanulos, Veratrum californicum, Mimulus primuloides), grasses (Achnatherum lettermanii, Poa pratensis, Deschampsia cespitosa, Holcus lanata), sedges (Carex rostrata, C.
Physiological integration among tillers of Holcus lanatus: age dependence and responses to clipping and competition.
caerulea swards in Epping Forest (73 adults detected, 96% of total number counted in the Forest), with only three adults recorded from Yorkshire fog, Holcus lanatus-dominated vegetation.
Suppression of the high affinity phosphate uptake system: a mechanism of arsenic tolerance in Holcus lanatus L.
Prior to the introduction of livestock, the dominant species were perennial ryegrass (Lolium perenne), Yorkshire fog (Holcus lanatus), and subterranean clover (Trifolium subterraneum), with phalaris (Phalaris aquatica), white clover (Trifolium repens), vulpia (Vulpia bromoides), barley grass (Hordeum glaucum), annual ryegrass (Lolium rigidum), and Patterson's curse (Echium plantagineum) also present.
As principais plantas espontaneas que ocorreram na area do experimento, durante o periodo de avaliacao, foram lingua-de-vaca (Rumex obtusifolius), picao-preto (Bidens pilosa), almeirao-docampo (Hypochoeris brasiliensis), losna-do-campo (Ambrosia elatior), tansagem (Plantago tomentosa), dente-de-leao (Taraxacum officinale), aveia-louca (Bromus catharticus), capim-lanudo (Holcus lanatus) e milha (Digitaria horizontalis).
Y maswellt penwyn (Holcus lanatus, 'Yorkshire fog') oedd un o'r gweiriau oedd yno ac roedd Robin pen grynu (Briza media, 'quaking-grass') yno hefyd.
It is my suspicion that the weed grass is Holcus lanatus, Yorkshire Fog, and that the seed will have blown in from nearby wasteland or farmland, where it can act as a host plant for the caterpillars of the Small Skipper butterfly, Thymelicus flavus.