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''Lomatium grayi'', commonly known as Gray's biscuitroot, Gray's lomatium, or milfoil lomatium, is a perennial herb of the family Apiaceae. It is native to Western Canada in British Columbia, and the Western United States, including from the Eastern Cascades and northeastern California to the Rocky Mountains. 〔(USDA: ''Lomatium grayi'' ); info + native distribution map . accessed 1.8.2013〕 〔(Consortium of California Herbaria (Jepson): ''Lomatium grayi'' distribution ). accessed 1.8.2013〕 It is a perennial herb found growing in dry rocky banks and slopes.〔''Lomatium grayi'' in Jepson Flora Project (eds.) Jepson eFlora, (info + detailed distribution map ) . accessed 1.8.2013〕 It has a lifespan of 5–7 years. ==Description== ''Lomatium grayi'' has glabrous stems that split at the ground, and a long, thick taproot. It flowers from April to July with 1–20 compound umbels, each with hundreds of yellow flowers. 〔 〔(Burke Museum—WTU Herbarium: ''Lomatium grayi'' ) — info + images . accessed 1.8.2013〕 ;Varieties *''Lomatium grayi'' var. ''depauperatum'' — Gray's biscuitroot (M.E. Jones) Mathias; endemic to northeastern Nevada and northwestern Utah. 〔(USDA Plants Profile: ''Lomatium grayi'' var. ''depauperatum'' — (Gray's biscuitroot) ) . accessed 1.8.2013〕 *''Lomatium grayi'' var. ''grayi'' — Gray's biscuitroot; 〔(USDA: ''Lomatium grayi'' var. ''depauperatum'' — (Gray's biscuitroot) ) . accessed 1.8.2013〕 〔 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「Lomatium grayi」の詳細全文を読む スポンサード リンク
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