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Sarracenia alabamensis
''Sarracenia alabamensis'', also known as the Cane-brake pitcher plant, is a carnivorous plant in the genus ''Sarracenia''. Like all the ''Sarracenia'', it is native to the New World. ''S. alabamensis'' subsp. ''alabamensis'' is found only in central Alabama, while subsp. ''wherryi'' is found in southwestern Alabama, eastern Mississippi and Florida. It is sometimes treated as two subspecies of ''S. rubra''.〔Rice, B.A. (2006). (The Carnivorous Plant FAQ: ''Sarracenia alabamensis'' ). Accessed 6 May 2009.〕
==Morphology and carnivory==
Like other members of the genus ''Sarracenia'', ''S. alabamensis'' traps insects using a rolled leaf, which in this species is finely pubescent and between 20 cm and 65 cm tall. It also forms large clumps within a few years. The uppermost part of the leaf is flared into a lid (the operculum), which prevents excess rain from entering the pitcher and diluting the digestive secretions within. The upper regions of the pitcher are covered in short, stiff, downwards-pointing hairs, which serve to guide insects alighting on the upper portions of the leaf towards the opening of the pitcher tube. The opening of the pitcher tube is retroflexed into a 'nectar roll' or peristome, whose surface is studded with nectar-secreting glands. Prey entering the tube find that their footing is made extremely uncertain by the smooth, waxy secretions found on the surfaces of the upper portion of the tube. Insects losing their footing on this surface plummet to the bottom of the tube, where a combination of digestive fluid, wetting agents and inward-pointing hairs prevent their escape. Some large insects (such as wasps) have been reported to escape from the pitchers on occasion, by chewing their way out through the wall of the tube.
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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