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Cypripedium arietinum
The rare Ram's-Head Lady's-Slipper (''Cypripedium arietinum'') is an orchid that grows in lightly shaded areas with calcareous soils. It is characteristic of the alvars around the Great Lakes in North America, as well as in New England.〔(US Department of Agriculture plants profile )〕〔Catling, P.M. and Brownell, V.R. 1999. Alvars of the Great Lakes Region. p. 375-391, in R. C. Anderson, J. S. Fralish, and J. M. Baskin (eds.) Savannas, Barrens and Rock Outcrop Communities of North America. Cambridge: Cambridge University Press.〕 In Canada, it is found from Quebec to Saskatchewan, plus an isolated population in Nova Scotia, where it grows on gypsum based soils, 330 km away from the nearest population in Maine.〔Blaney, S. and D. Mazerolle. 2007. Nova Scotia Provincial Status Report on Ram's-Head Lady Slipper (Cypripredium arietinum R. Br.). Nova Scotia Department of Natural Resources.〕〔(Biota of North America Program, county distribution map )〕
== Description ==
''Cypripedium arietinum'' is a small Lady's-Slipper which typically has 3, but sometimes 4-5, leaves. This species has a single flower on each stem having divided lateral sepals and a unique hairy pouch shaped like an funnel. The purplish-red flower has light venation and is white at the lip.
The plant grows to 10–40 cm (4–16 in), and the flowers may reach 1–2 cm (0.5-0.75 in). It flowers from May to June, producing brownish-green flowers with a pink and white lip.
The Ram's-Head Lady's-Slipper is difficult to cultivate, and rarely survives transplantation to a garden from the wild. It should never be removed from any natural area.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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