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Pseudotrillium
''Pseudotrillium'' is a proposed monotypic genus of flowering plants containing the single species ''Pseudotrillium rivale'', which is known by the common name brook wakerobin. The genus was proposed in 2002 on the basis of morphology and molecular evidence that suggest the plant should no longer be included in genus ''Trillium''.〔Farmer, S. B. and E. E. Schilling. (2002). (Phylogenetic analyses of Trilliaceae based on mophological and molecular data. ) ''Systematic Botany'' 27:4 674-92.〕
This species is endemic to the Siskiyou Mountains of southern Oregon (Josephine, Coos, Douglas, + Curry counties) and northern California (Siskiyou + Del Norte counties), usually on soils of ultramafic origin, such as serpentine.〔(Kew World Checklist of Selected Plant Families )〕〔(Biota of North America Program 2013 county distribution map )〕〔(Calflora taxon report, University of California @ Berkeley, ''Pseudotrillium rivale'' (S. Watson) S. Farmer Siskiyou wakerobin )〕
''Pseudotrillium rivale'' is a rhizomatous perennial growing up to 20 centimeters in height. The three bracts have generally lance-shaped blades up to 11 centimeters long borne on petioles. The blades are glossy blue-green with silvery venations. Atop the whorl of bracts is a single nodding non-fragrant flower with green sepals and pink-blushed white petals up to 3 centimeters long by 2 wide.〔(Jepson Manual Treatment: ''Trillium rivale'' )〕
This plant has gained the Royal Horticultural Society's Award of Garden Merit.〔(Royal Horticultural Society, ''Trillium rivale,'' brook wakerobin )〕
==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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