Amerorchis rotundifolia (Banks) Hulten
Aplectrum hyemale (Muhlenberg ex Willdenow) Torrey
Calopogon tuberosus (Linnaeus) Britt. var. tuberosus
Calypso bulbosa (Linnaeus) Oakes var. americana (R. Brown) Luer
Coeloglossum viride (Linnaeus) Hartman var. virescens (Muhlenberg) Luer
Corallorhiza maculata (Rafinesque) Rafinesque var. maculata
Corallorhiza maculata (Rafinesque) Rafinesque var. occidentalis (Lindley) Ames
Corallorhiza striata Lindley var. striata
Corallorhiza trifida Chatelain
Cypripedium arietinum R. Brown in Aiton
Cypripedium parviflorum Salisbury var. makasin (Farwell) Sheviak
Cypripedium parviflorum Salisbury var. pubescens (Willdenow) Knight
Cypripedium passerinum Richmond var. passerinum
Cypripedium x andrewsii Fuller nm. andrewsii
Cypripedium x andrewsii Fuller nm. favillianum (Curtis) Boivin
Cypripedium x andrewsii nm. landonii (Garay) Boivin
Dactylorhiza cf. fuchsii (Druce) Soó
Epipactis helleborine (Linnaeus) Cranz
Galearis spectabilis (Linnaeus) Rafinesque
Goodyera oblongifolia Rafinesque
Goodyera pubescens (Willdenow) R. Brown
Goodyera repens (Linnaeus) R. Brown
Isotria medeoloides (Pursh) Rafinesque
Isotria verticillata (Willdenow) Rafinesque
Liparis lilifolia (Linnaeus) Richard
Liparis loeselii (Linnaeus) Richard
Listera convallarioides (Swartz) Nuttall
Listera cordata (Linnaeus) R. Brown var. cordata
Listera ovata (Linnaeus) Aiton filius
Malaxis brachypoda (Gray) Fernald
Malaxis paludosa (Linnaeus) Swartz
Piperia unalascensis (Sprengel) Rydberg.
Platanthera blephariglottis (Willdenow) Lindley var. blephariglottis
Platanthera ciliaris (Linnaeus) Lindley
Platanthera clavellata (Michaux) Luer var. ophioglossoides (Fernald) P. M. Brown
Platanthera dilatata (Pursh) Lindley var. dilatata
Platanthera flava (Linnaeus) Lindley var. herbiola (R. Brown) Luer
Platanthera grandiflora (Bigelow) Lindley
Platanthera hookeri (Torrey) Lindley
Platanthera huronensis (Linnaeus) Lindley
Platanthera hyperborea (Linnaeus) Lindley var. hyperborea
Platanthera lacera (Michaux) G. Don
Platanthera leucophaea (Nuttall) Lindley
Platanthera macrophylla (Goldie) P. M. Brown
Platanthera obtusata (Banks & Pursh) Lindley
Platanthera orbiculata (Pursh) Lindley
Platanthera psycodes (Linnaeus) Lindley
Platanthera x andrewsii (Niles) Luer
Platanthera x media (Rydberg) Luer
Pogonia ophioglossoides (Linnaeus) Ker-Gawler var. ophioglossoides
Spiranthes casei Catling & Cruise var. casei
Spiranthes cernua (Linnaeus) L.C. Richard
Spiranthes lacera Rafinesque var. lacera
Spiranthes lacera Rafinesque var. gracilis (Bigelow) Luer
Spiranthes magnicamporum Sheviak
Spiranthes ochroleuca (Rydberg) Rydberg
Spiranthes ovalis Lindley var. erostellata Catling
Spiranthes romanzoffiana Chamisso