|
''Diphasiastrum'' is a genus of clubmosses in the plant family Lycopodiaceae. It is closely related to the genus ''Lycopodium'', and some botanists treat it within a broad view of that genus as a section, ''Lycopodium'' sect. ''Complanata''. Some species superficially resemble diminutive gymnosperms and have been given common names such as ground-pine or ground-cedar. The genus has a subcosmopolitan distribution, in much of the Northern Hemisphere, south in mountains to South America (reaching furthest south in Jujuy Province, northwest Argentina), New Guinea and the Marquesas Islands in the Pacific Ocean, but confined to climates with high humidity for most or all of the year (or, in cool climates, protected by snow cover in winter). There are 16 species, and numerous natural hybrids in the genus; many of the hybrids are fertile, allowing their occurrence to become frequent, sometimes more so than the parent species. The basal chromosome count for this genus is ''n=23'', which is distinctively different from other lycopods. Several species have been used economically for their spores, which are harvested as Lycopodium powder. == Species == * ''Diphasiastrum alpinum'' Alpine Clubmoss (circumpolar, subarctic and alpine) * ''Diphasiastrum angustiramosum'' (New Guinea) * ''Diphasiastrum complanatum'' Flat-stemmed Clubmoss, Northern Running-pine, or Ground Cedar (circumpolar, cool temperate) * ''Diphasiastrum digitatum'' Fan Clubmoss, Southern Running-pine, or Running Cedar (eastern Canada, northeastern United States) * ''Diphasiastrum fawcettii'' (Jamaica, Hispaniola) * ''Diphasiastrum henryanum'' (Marquesas Islands) * ''Diphasiastrum madeirense'' (Madeira, Azores) * ''Diphasiastrum montellii'' (Russia; syn. ''D. complanatum'' subsp. ''montellii'') * ''Diphasiastrum multispicatum'' (Taiwan, Philippines) * ''Diphasiastrum nikoense'' (Japan; syn. ''D. sitchense'' var. ''nikoense'') * ''Diphasiastrum platyrhizoma'' (Borneo, Sumatra) * ''Diphasiastrum sitchense'' Alaskan Clubmoss (northern North America) * ''Diphasiastrum thyoides'' (Caribbean, Central and South America) * ''Diphasiastrum tristachyum'' Blue Clubmoss, Blue Ground-cedar (circumpolar, cool temperate; syn. ''D. complanatum'' subsp. ''chamaecyparissus'') * ''Diphasiastrum veitchii'' Veitch's Clubmoss (eastern Himalaya east to Taiwan) * ''Diphasiastrum wightianum'' (southeast Asia, New Guinea) * ''Diphasiastrum yueshanense'' (Taiwan) 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「Diphasiastrum」の詳細全文を読む スポンサード リンク
|