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Tuctoria greenei
''Tuctoria greenei'' is a species of grass endemic to California.〔(Calflora: ''Tuctoria greenei'' )〕 Its common names include awnless spiralgrass and Greene's tuctoria. It is included by the California Native Plant Society on list 1B.1 (rare, threatened, or endangered).〔California Native Plant Society (2001) ''Inventory of Rare and Endangered Plants of California''〕 It is also listed by the state of California as rare and by the Federal Government as endangered, having been federally listed on March 26, 1997.
This grass typically occurs in vernal pools in open grassland on the eastern side of the Sacramento and San Joaquin Valleys.〔C.Michael Hogan, Marc Papineau, George Ball et al., ''Environmental Assessment for the Claribel and Albers Roads Golf Course and Residential Development, Stanislaus County'', Earth Metrics Inc., published by Stanislaus County and the State of California Environmental Clearinghouse, Report number 10540, June 7, 1990〕 This endangered species is threatened by the destruction of its already rare vernal pool habitat.〔(Species Account: Greene's Tuctoria )〕 Processes causing this habitat destruction include agriculture, urban development, overgrazing and trampling by livestock, alterations in hydrology, and introduced species.〔
==See also==
*''Tuctoria mucronata''
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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