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Corallorhiza mertensiana
''Corallorhiza mertensiana'', or Pacific coralroot, is a coralroot orchid native to the shady conifer forests of northwestern North America.〔(Kew World Checklist of Selected Plant Families )〕〔http://plants.usda.gov/core/profile?symbol=COME17〕 It also goes by the common names Western coralroot and Mertens' coralroot.〔Turner, Mark & Phyllis Gustafson. Wildflowers of the Pacific Northwest. Timber Press Field Guide.〕 ''Corallorhiza mertensiana'' used to be considered a subspecies of ''Corallorhiza maculata'' but was given species rank in 1997 by Freudenstein.〔http://www.researchgate.net/profile/Tom_Bruns/publication/227802288_Population_habitat_and_genetic_correlates_of_mycorrhizal_specialization_in_the_cheating_orchids_Corallorhiza_maculata_and_C._mertensiana/links/0912f512aa6777058c000000.pdf〕
== Description ==
''Corallorrhiza mertensiana'' is a leafless, parasitic, perennial orchid that is 6-20 inches tall.〔Kemper, John. Wildflowers of Southern Oregon: A Field Guide.〕 The stem is red to brownish purple. The upper petals are pink to reddish pink, with yellow to dark red veins. The lower petals are wider, dark pink to red, and have three deep red veins. Beneath the lower petal the spur is prominent.〔 The flower spikes are visible from May to August.〔 ''Corallorrhiza mertensiana'' has no roots, only hard, branched rhizomes that resemble coral.〔http://wanativeorchids.com/Corallorhiza/index.html〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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