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''Arabis hirsuta'', known as hairy rock-cress, is a flowering plant of the genus ''Arabis'' in the family Brassicaceae. In previous North American works, it has been broadly defined to include plants native to Europe, Asia, and the northern half of North America,〔Reed Clark Rollins. ''The Cruciferae of Continental North America''. Stanford University Press. 1993.〕 but is now more often restricted to a narrower subgroup restricted to Europe.〔(Flora of North America, ''Arabis'' Linnaeus, 1753; Rockcress )〕〔J.. ZR. Aleroyd. ''Arabis''. in Tutin et. al. ''Flora Europaea''. vol. 1. 2nd ed. 1993.〕〔Robert Karl, Marcus A. Koch. ''Phylogenetic signatures of adaptation: The Arabis hirsuta species aggregate (Brassicaceae) revisited''. ''Perspectives in Plant Ecology, Evolution and Systematics''. in press. Available online 24 June 2014〕 This erect, 15–60 cm (6-18 inches) high hairy plant is usually unbranched, with a long spike of flowers. Lower leaves form a rosette, the stalkless upper-leaves clasp the stem. The white petals are twice as long as the sepals, flowers June–August. The fruits are cylindrical and pressed close to the stem and the slightly winged seeds are reddish brown. The hairs are stiff and forking,. The species grows on chalk slopes, dunes, hedgebanks, walls and rocks.〔Reader's Digest Nature Lover's Library, Field Guide to the Wildflowers of Britain, Editor Michael W. Davison, Art Editor Neal V. Martin, The Reader's Digest Association Limited, 11 Westferry Circus, Canary Wharf, London E144HE, Reprint 2001, ISBN 0 276 42506 5.〕 ==Gallery== File:Arabis hirsuta FlowersCloseup 2009-4-04 DehesaBoyalPuertollano.jpg File:Rauhaarige Gänsekresse (Arabis hirsuta) 5731.JPG Image:Arabis hirsuta eF.jpg File:Arabis hirsuta — Flora Batava — Volume v13.jpg File:Arabis hirsuta i01.jpg 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「Arabis hirsuta」の詳細全文を読む スポンサード リンク
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