Heart-leaf Twayblade:Neottia cordata
Northwest Twayblade, Northwestern Twayblade, Western Twayblade: Neottia banksiana (Synonyms: Listera caurina, Listera retusa, Ophrys caurina) -
Broadleaf Twayblade, Broad-lip Twayblade, Broadlipped Twayblade, Broad-lipped Twayblade: Neottia convallarioides (Synonyms: Bifolium convallarioides, Diphryllum convallarioides, Epipactis convallarioides, Listera eschscholziana, Listera convallarioides, Ophrys convallarioides) -
Heartleaf Twayblade, Heart-leaf Twayblade, Heart-leaved Twayblade: Neottia cordata (Synonyms: Bifolium cordatum, Diphryllum cordatum, Distomaea cordata, Listera cordata var. cordata, Listera cordata ssp. nephrophylla, Listera cordata var. neophrophylla,Listera nephrophylla, Neottia cordata, Neottia nephrophylla, Ophrys cordata, Pollinirhiza cordata) -