Amerorchis rotundifolia (Banks) Hulten
Calypso bulbosa (Linnaeus) Oakes var. americana (R. Brown) Luer
Calypso bulbosa (Linnaeus) Oakes var. occidentalis (Holtz.) Boivin
Cephelanthera austiniae L.C. Richard
Coeloglossum viride (Linnaeus) Hartman var. virescens (Muhlenberg) Luer
Corallorhiza maculata (Rafinesque) Rafinesque var. maculata
Corallorhiza maculata (Rafinesque) Rafinesque var. occidentalis (Lindley) Ames
Corallorhiza mertensiana Bongard
Corallorhiza striata Lindley var. striata
Corallorhiza trifida Chatelain
Cypripedium montanum Douglas ex Lindley
Cypripedium parviflorum Salisb. var. makasin (Farwell) Sheviak
Cypripedium parviflorum Salisb. var. pubescens (Willdenow) Knight
Cypripedium passerinum Richmond var. passerinum
Epipactis gigantea Douglas ex Hooker
Goodyera repens (Linnaeus) R. Brown
Listera cordata (Linnaeus) R. Brown var. cordata
Listera cordata (Linnaeus) R. Brown var. nephrophylla (Rydberg) Hulten
Malaxis paludosa (Linnaeus) Swartz
Piperia candida Morgan & Ackerman
Piperia elegans (Lindley) Rydberg subsp. elegans
Piperia unalascensis (Sprengel) Rydberg.
Platanthera chorisiana (Chamisso) Reichenbach
Platanthera dilatata (Pursh) Lindley var. dilatata
Platanthera dilatata (Pursch) Lindley var. albiflora (Chamisso) Ledebour
Platanthera dilatata (Pursh) Lindley var. leucostachys (Lindley) Luer
Platanthera hyperborea (Linnaeus) Lindley var. hyperborea
Platanthera obtusata (Banks & Pursh) Lindley
Platanthera orbiculata (Pursh) Lindley
Spiranthes romanzoffiana Chamisso
Last revised: Friday, September 13, 1996