Neottia smallii (syn. Listera smallii), the kidneyleaf twayblade or Appalachian twayblade, (as Listera smallii) is a species of terrestrial orchid found in the eastern United States. It occurs in the Appalachian Mountains from northern New Jersey to northeastern Georgia.Flora of North America v 26 p 591, Appalachian twayblade, kidney-leaf twayblade, Listera smallii Wiegand, Bull. Torrey Bot. Club. 26: 169. 1899. Biota of North America Program, 2013 county distribution map, Neottia smallii
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