Platanthera rotundifolia (Banks ex Pursh) Lindl. [ Orchis rotundifolia Banks ex Pursh]
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Platanthera rotundifolia (Banks ex Pursh) Lindl. [ Orchis rotundifolia Banks ex Pursh] [Orchidaceae]
M.V. Walcott, N. Amer. Wild Fl., vol. 1 : t. 65 (1925-1927)