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''Diphasiastrum digitatum'' is known as groundcedar, running cedar or crowsfoot, along with other members of its genus, but the common name fan clubmoss can be used to refer to it specifically. It is the most common species of ''Diphasiastrum'' in North America. It is a type of plant known as a clubmoss, which is within one of the three main divisions of living vascular plants. It was formerly included in the superspecies ''Diphasiastrum complanatum''. For many years, this species was known as ''Lycopodium flabelliforme'' or ''Lycopodium digitatum''.〔(United States Department of Agriculture Plants Profile )〕〔(Biota of North America Program 2014 state-level distribution map )〕 Its common name is due to its resemblance to cedar boughs lying on the ground. Its leaves are scale-like and appressed, like a mature cedar, and it is glossy and evergreen. It normally grows to a height of about four inches (10 cm), with the spore-bearing strobili held higher. This plant was once widely harvested and sold as Christmas greenery, and populations were widely depleted for this reason. However, it has greatly recovered throughout its range, and makes large clonal colonies, carpeting the forest floor.〔(Flora of North America, ''Diphasiastrum digitatum'' (Dillenius ex A. Braun) Holub, 1975. Southern running-pine, lycopode en éventail )〕 It prefers disturbed areas and coniferous forest, where it makes dense monocultures. The subterranean, brown gametophytes may live for years in the soil before sending forth vegetative shoots. According to expert sources its range is in the higher Appalachian mountains northward, and its range ends in northern Georgia and Alabama, but isolated stands have sprung up elsewhere. In the Appalachian Mountains of Southwest Virginia, the plant is known locally as "Bear's Paw." This species was also once one of the principal clubmoss species used for collection of Lycopodium powder, used as a primitive flashpowder. As a cultivated plant it forms a very nice carpet in shaded areas. However mowing it significantly stunts the plant's growth, and the plant can take months to recover fully. It takes to transplanting with ease, so long as it is kept sufficiently damp while out of the ground and is transplanted into good habitat quickly. *Gardening Note * Most gardeners actually find this plant extremely difficult to transplant, often failing after numerous attempts. If one can indeed establish this wonderful plant, it makes a great native addition to any shaded woodland area. ==References== 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「Diphasiastrum digitatum」の詳細全文を読む スポンサード リンク
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