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''Allium perdulce'', the Plains onion, is a plant species native to the central part of the United States and cultivated as an ornamental elsewhere.〔(Gardening Europa, Allium perdulce )〕 It has been found in Texas, New Mexico, Oklahoma, Kansas, Nebraska, South Dakota, and one county in western Iowa (Woodbury County).〔(Flora of North America, ''Allium perdulce'' )〕〔(BONAP (Biota of North America Program), 2014 county distribution map, ''Allium perdulce'' )〕 ''Allium perdulce''produces 2-20 bulbs, each up to 3 cm (1.2 inches) in diameter. Flowers are urn-shaped, up to 10 mm (0.4 inches) across; tepals deep rose to purple (except in var. ''sperryi''; see below); pollen yellow.〔〔Fraser, Samuel Victorian. 1940. Transactions of the Kansas Academy of Science 42: 124–126.〕〔Great Plains Flora Association. 1986. Flora of the Great Plains i–vii, 1–1392. University Press of Kansas, Lawrence.〕〔Correll, D. S. & M. C. Johnston. 1970. Manual of the Vascular Plants of Texas i–xv, 1–1881. The University of Texas at Dallas, Richardson.〕 Two varieties are recognized:〔〔(The Plant List )〕 *''Allium perdulce'' var. ''perdulce'' *''Allium perdulce'' var. ''sperryi'' Ownbey〔Ownbey, Francis Marion. 1950. Research Studies of the State College of Washington 18(4): 202–203, f. 4.〕〔Traub, Hamilton Paul, & Ownbey, Francis Marion. 1967. Plant Life 23: 110.〕〔(photo of herbarium specimen at Missouri Botanical Garden, isotype of ''Allium perdulce'' var. ''sperryi'' )〕 Var. ''sperryi'' is a color variant known only from western Texas in the trans-Pecos region. It has white to pale pink flowers instead of the more widespread deep rose to purple.〔 ==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 perdulce」の詳細全文を読む スポンサード リンク
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