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Spiranthes lacera : ウィキペディア英語版 | Spiranthes lacera
''Spiranthes lacera'', commonly called the slender ladies'-tresses, is a species of orchid that is native to Eastern North America. It has a widespread range and is found in a variety of open habitats, both natural and disturbed. It produces a spiral of white flowers in the summer. There are two varieties recognized:〔http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242101954 ''Spiranthes lacera'' in Flora of North America〕 *''S. lacera'' var. ''gracilis'' - Southern slender ladies' tresses. Flowers more densely arranged in spiral, blooming later (late-July through August). Plant hairless and leaves usually absent at flowering. *''S. lacera'' var. ''lacera'' - Northern slender ladies' tresses. Flowers more loosely arranged in spiral, blooming earlier (mid-July). Plant hairy and leaves usually present at flowering. ==References==
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