|
''Psathyrotes'' is a genus of North American plants in the sneezeweed tribe within the sunflower family.〔(Gray, Asa. 1853. Smithsonian Contributions to Knowledge 5(6): 100 )〕 annual and perennial forbs and low subshrubs native to dry areas of southwestern North America. Common names include turtleback, brittlestem, and fanleaf. The plants are low, densely branching, hairy, and scaly, with a turpentine-like odor. Leaves are alternate and hairy. The Latin name of the genus (from the Greek ''psathurotes'') refers to the brittleness of the stems. ;Species〔〔(Biota of North America Program 2013 county distribution maps )〕 * ''Psathyrotes annua'' (Nutt.) Gray (annual psathyrotes, mealy rosettes, turtleback) - CA NV UT AZ ID * * Synonyms: ''Bulbostylis annua'' Nutt. * * Annual or perennial forb * ''Psathyrotes pilifera'' Gray (hairy-beast turtleback, hairybeast brittlestem) - NV UT AZ * * Annual forb * ''Psathyrotes ramosissima'' (Torr.) Gray (velvet rosette, velvet turtleback, turtleback) - NV UT AZ CA, Baja California, Sonora * * Synonyms: ''Tetradymia ramosissima'' Torr. * * Annual or perennial forb or subshrub ;formerly included〔 see ''Peucephyllum Psathyrotopsis Trichoptilium'' * ''Psathyrotes incisa'' A.Gray - ''Trichoptilium incisum'' (A.Gray) A.Gray * ''Psathyrotes purpusii'' Brandegee - ''Psathyrotopsis purpusii'' (Brandegee) Rydb. * ''Psathyrotes scaposa'' A.Gray - ''Psathyrotopsis scaposa'' (A.Gray) H.Rob. * ''Psathyrotes schottii'' (A.Gray) A.Gray - ''Peucephyllum schottii'' A.Gray == References== 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「Psathyrotes」の詳細全文を読む スポンサード リンク
|