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British NVC community W17 (Quercus petraea - Betula pubescens - Dicranum majus woodland) : ウィキペディア英語版 | British NVC community W17 (Quercus petraea - Betula pubescens - Dicranum majus woodland) NVC community W17 (''Quercus petraea - Betula pubescens - Dicranum majus'' woodland) is one of the woodland communities in the British National Vegetation Classification system. It is one of the six communities falling in the "mixed deciduous and oak/birch woodlands" group. This is a widely distributed community in northern and western Britain and represents mossy deciduous woodland of the uplands. There are four subcommunities. ==Community composition==
Two constant species are found in the tree canopy of this community: * Sessile oak (''Quercus petraea'') * Downy birch (''Betula pubescens'') Eight constant species are found in the field and ground layers of this community: * Wavy hair grass (''Deschampsia flexuosa'') * Greater fork-moss (''Dicranum majus'') * Glittering wood-moss (''Hylocomium splendens'') * Waved silk-moss (''Plagiothecium undulatum'') * Red-stemmed feather-moss (''Pleurozium schreberi'') * Bank haircap moss (''Polytrichum formosum'') * Little shaggy-moss (''Rhytidiadelphus loreus'') * Blueberry (''Vaccinium myrtillus'') Rare species associated with the community include ''Hymenophyllum wilsonii'' and a number of oceanic bryophytes.
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