|
''Sclerocactus brevihamatus'' is a species of cactus known by the common name shorthook fishhook cactus. It is endemic to Texas, and is an endangered species. 〔(USFWS: Determination that ''Ancistrocactus tobuschii'' is an endangered species. ) — ''Federal Register. November 7, 1979''.〕 Threats to the species and subspecies include collecting and development in its habitat.〔 ==Subspecies== Subspecies and varieties of this cactus include: *''Sclerocactus brevihamatus'' subsp. ''brevihamatus'' — shorthook fishhook cactus. 〔(USDA: ''Sclerocactus brevihamatus'' subsp. ''brevihamatus'' )〕 *''Sclerocactus brevihamatus'' var. ''pallidus'' — synonym of ''Sclerocactus brevihamatus'', 〔(Encyclopedia of Cacti: 'Sclerocactus brevihamatus'' var. ''pallidus'' )〕 also known as ''Ancistrocactus brevihamatus'' var. ''pallidus''. 〔(USDA/GRIN: ''Ancistrocactus brevihamatus'' var. ''pallidus'' )〕 *''Sclerocactus brevihamatus'' ssp. ''tobuschii'' — Tobusch fishhook cactus. 〔(USDA/GRIN: ''Sclerocactus brevihamatus'' ssp. ''tobuschii'' )〕 It is also been known as a separate species, ''Ancistrocactus tobuschii''. :::The rare Tobusch fishhook cactus is a federally listed endangered species also. It is known from about 200〔(The Nature Conservancy )〕 to about 500〔(Center for Plant Conservation )〕 individual specimens on the eastern part of the Edwards Plateau. It occurs in the ''Juniperus ashei''-''Quercus fusiformis'' plant association on calcareous soils.〔Sutton, K., et al. (1997). Habitat of ''Ancistrocactus tobuschii'' (Tobusch fishhook cactus, Cactaceae) on the Edwards Plateau of Central Texas. ''Southwestern Naturalist'' 42:4 441.〕 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「Sclerocactus brevihamatus」の詳細全文を読む スポンサード リンク
|