Malaxis unifolia in southern Cumberlands

Malaxis unifolia, or the green adder's-mouth orchid,[2] is a species of orchid occurring from eastern and central Canada (Newfoundland to Manitoba),[3] the central and eastern United States (Maine to Florida, west as far as Minnesota, eastern Kansas, and eastern Texas),[4] Mexico,[5] Central America and the Greater Antilles (Cuba, Jamaica, Dominican Republic).[6][7][8]

Malaxis unifolia generally has only one leaf, but rarely two. Flowers are green, in a raceme, often resembling an umbel at first before it elongates.[7]

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