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''Carlina acaulis'' (stemless carline thistle, dwarf carline thistle, silver thistle) is a perennial dicotyledonous flowering plant in the family Asteraceae, native to alpine regions of central and southern Europe.〔 〕 The specific name ''acaulis'' (New Latin for "without a stem," from Latin ''caulis'' "stem" or "stalk") and common names are descriptive of the manner in which its flower head rests directly upon a basal leaf rosette. The spiny, pinnatilobate leaves grow in a basal rosette approximately 20 cm in diameter. The flowers are produced in a large (up to 10 cm) flowerhead of silvery-white ray florets around a central disc. The disc florets are tubular and yellow-brown in colour. To protect the pollen, the head closes in wet weather, a phenomenon folklore holds to presage forthcoming rain.〔 〕 The flowering time is between August and September. It prefers chalky soils and dry pastures in environments from valleys up to an altitude of 2,800 m. ;Subspecies There are two subspecies:〔 * ''Carlina acaulis'' subsp. ''acaulis'' – inflorescences sessile * ''Carlina acaulis'' subsp. ''simplex'' – inflorescences with a short stem == Uses == The rhizome contains a number of essential oils, in particular the antibacterial carlina oxide.〔 〕 The root was formerly employed in herbal medicine as a diuretic and cold remedy.〔 〕 While young, the flowerhead bud can be cooked and eaten in a similar manner to the Globe artichoke, which earned it the nickname of ''hunter's bread''. It is sometimes cultivated as a rockery plant, or dried and hung as a house decoration. In Basque culture it was traditionally used as symbol of good fortune, fixed into the frontal door of the house and was given by the goddess Mari 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「Carlina acaulis」の詳細全文を読む スポンサード リンク
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