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''Allium sanbornii'' is a North American species of wild onion known by the common name Sanborn's onion.〔(Kew World Checklist of Selected Plant Families )〕 It is native to northern California and southwestern Oregon.〔(Biota of North America Program 2014 county distribution map )〕 It grows in the serpentine soils of the southern Cascade Range and northern Sierra Nevada foothills.〔(USDA Plants Profile )〕〔(Flora of North America, ''Allium sanbornii'' )〕 ''Allium sanbornii'' produces a reddish brown bulb up to about 2.5 centimeters long. Scape up to 60 centimeters long, bearing a single cylindrical leaf which is about the same length. The umbel contains as many as 150 small flowers, each with tepals less than a centimeter long, pink to white with darker red midveins. Anthers are yellow or purple; pollen yellow or white.〔〔(Jepson Manual Treatment )〕〔(Wood, Alphonso. 1868. Proceedings of the Academy of Natural Sciences of Philadelphia 20(6): 171. )〕 ;Varieties〔〔(Calflora Taxon Report 229, ''Allium sanbornii'' Alph. Wood, Sanborn's onion )〕 *''Allium sanbornii'' var. ''congdonii'' Jeps. - from Nevada County to Mariposa County *''Allium sanbornii'' var. ''sanbornii'' - from Shasta County to Mariposa County in California; Jackson + Josephine Counties in Oregon ;formerly included〔〔Denison, S.S. & McNeal, Dale W. 1989. Madroño 36(2): 127-128〕 * ''Allium sanbornii'' var. ''jepsonii'' Ownbey & Aase ex Traub, now called ''Allium jepsonii'' (Ownbey & Aase ex Traub) S.S.Denison & McNeal * ''Allium sanbornii'' var. ''tuolumnense'' Ownbey & Aase ex Traub, now called ''Allium tuolumnense'' (Ownbey & Aase ex Traub) S.S.Denison & McNeal ==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「Allium sanbornii」の詳細全文を読む スポンサード リンク
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