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Rainiera
''Rainiera'' is a monotypic genus of flowering plants in the daisy family, Asteraceae. The single species, ''Rainiera stricta'', is endemic to the northwestern United States (Oregon and Washington). The genus is part of the tribe Senecioneae, and appears to be most closely related to ''Luina'', another genus of northwestern North America, in which it was once placed. ''Rainiera stricta'' is of conservation concern, with a G2G3 ranking from NatureServe, and is considered to be globally imperiled. It is known by the common name false silverback.
==Description==
''Rainiera stricta'' is an herbaceous perennial with both basal and cauline, alternate, petiolate leaves. It has 30-70 discoid heads arranged in a raceme-like or thyrse-like capitulescence. The disk florets are about 5 per head, and have yellow, sometimes purple-tinged corollas. The cypselae (achenes) are glabrous and have a pappus of white or straw-colored bristles. It is distinguished from ''Luina'' by the having fewer florets per head and a racemiform, rather than corymbiform, capitulescence.
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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