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''Trillium albidum'', known by the common names giant white wakerobin, white toadshade, and sweet trillium, is a species of flowering plant native to the northwestern United States from Washington to central California. It occurs in forests, woodlands, scrub, and chaparral habitat, becoming common in some areas.〔〔(Biota of North America Program 2013 county distribution map )〕〔(Calflora taxon report, University of California, ''Trillium albidum'' Freeman giant white wakerobin )〕 ''Trillium albidum'' is a rhizomatous perennial herb with one or more erect stems growing ers in height. There is a whorl of three large leaves generally described as bracts,〔(Flora of North America ) Vol. 26: Pages 94, 106, 107, 113.〕 each measuring up to 20 centimeters in length. They are green and mottled with brownish or darker green spots. Each stem produces one flower, which is held on top of the bracts. The fragrant flower has three lance-shaped green sepals and three wider white or pink- or purple-tinged petals measuring up to long. ;Varieties〔(Kew World Checklist of Selected Plant Families )〕 * ''Trillium albidum'' subsp. ''albidum'' - California, west-central + southwestern Oregon * ''Trillium albidum'' subsp. ''parviflorum'' (V.G.Soukup) K.L.Chambers & S.C.Meyers - Washington, northwestern Oregon ==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「Trillium albidum」の詳細全文を読む スポンサード リンク
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