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Blepharizonia plumosa
''Blepharizonia plumosa'' is a California species of tarweed known by the common name big tarweed. It is endemic to central California, where it grows in the Central Coast Ranges and adjacent sections of the southern San Francisco Bay Area and Central Valley, from southern Sonoma County south as far as San Luis Obispo County.〔(Calflora taxon report, University of California, ''Blepharizonia plumosa'' (Kellogg) E. Greene, big tarweed )〕
This is a glandular, aromatic annual herb producing a hairy, erect stem which may approach two meters (80 inches) in height. The leaves are linear in shape and sometimes toothed, the largest located near the base of the plant reaching 15 centimeters (6 inches) long. The inflorescence bears several flower heads, each with a fringe of up to 13 red-veined white ray florets just under a centimeter long. The center of each head is filled with protruding tubular disc florets with large dark anthers. The fruit is a hairy, club-shaped achene which may or may not have a pappus at the tip.〔(Flora of North America, ''Blepharizonia plumosa'' (Kellogg) Greene )〕
''Blepharizonia'' is sometimes treated as a monotypic genus, and sometimes as a genus with two species. One variety or subspecies of ''B. plumosa'' is sometimes treated as a distinct species called ''Blepharizonia laxa''.〔(Greene, Edward Lee 1885. Bulletin of the California Academy of Sciences 1(4D): 279 )〕〔
==References==
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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