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''Holcus lanatus'' is a perennial grass. The specific epithet ''ラテン語:lanatus'' is Latin for 'woolly' which describes the plant's hairy texture. Common names include Yorkshire fog, tufted grass, and meadow soft grass. In North America, where it is an invasive species,〔(CAL-IPC Invasive Plant Definitions. ) California Invasive Plant Council.〕 names include velvet grass and common velvet grass.〔Hubbard, C. E. ''Grasses''. Harmondsworth: Penguin Books. 1976. ISBN 978-0-14-013227-4〕〔(Yorkshire Fog. ) Garden Organic. Henry Doubleday Research Association (HDRA).〕 In parts of northern Europe the grass is a common native species and a hardy pasture grass. ==Characteristics and hybrids== ''Holcus lanatus'' has velvety grey-green leaves. The stems are round. The bases of the stems are white with pink stripes or veins; this character has been called the "stripy pyjamas".〔(''Holcus lanatus''. ) The Nature's Calendar Survey.〕 The inflorescence is robust and often tinged purple. It produces a large amount of seed and is a rapid coloniser of disturbed ground. It prefers wetter ground; it is often seen around drainage ditches. The ligule is long, blunt, and hairy. This species can be distinguished from ''H. mollis'' by the beardless nodes on its culm, the absence of rhizomes, and the awn becoming hooked when dry and not projecting beyond the tips of the glumes.〔 It has been known to hybridize with ''H. mollis'', producing a male sterile hybrid with 2''n'' = 21 chromosomes.〔 Hybrids tend to resemble ''H. lanatus'' in their morphology.〔 It spreads vegetatively by developing new shoots and roots at its nodes. Plants form a blanket of runners on the soil surface. Semi-prostrate rosettes of shoots called 'mops' may form at the end of the runners. These mops root readily in contact with moist soil.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Holcus lanatus」の詳細全文を読む スポンサード リンク
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