| Aplectum hyemale |
putty root orchid |
| Arethusa bulbosa |
dragon’s mouth orchid |
| Calopogon tuberosa |
grass pink |
| Coeloglossum viride var. virescens |
long-bracted orchid |
| Corallorhiza maculata |
spotted coral-root |
| Corallorhiza odontorhiza |
autumn coral-root |
| Corallorhiza trifida |
spring coral-root |
| Cypripedium acaule |
pink lady’s-slipper |
| Cypripedium calceolus var. parviflorum |
small yellow lady’s-slipper |
| Cypripedium calceolus var. pubescens |
large yellow lady’s-slipper |
| Cypripedium candidum |
white lady’s-slipper |
| Cypripedium reginae |
queen lady’s-slipper |
| Epipactis helleborine |
broad leaved helleborine |
| Galearis spectabilis |
showy orchis |
| Goodyera pubescens |
downy rattlesnake orchid |
| Goodyera tesselata |
checkered rattlesnake plantain |
| Isotria verticillata |
whorled pogonia |
| Liparis liliifolia |
lily-leaved twayblade |
| Liparis loeselii |
fen orchid |
| Listera cordata |
heartleaf twayblade |
| Malaxis unifolia |
green adder’s-mouth |
| Platanthera blephariglottis |
white fringed orchid |
| Platanthera clavellata |
club-spur orchid |
| Platanthera hyperborean |
northern green orchid |
| Platanthera flava var. herbiola |
tubercled rein orchid |
| Platanthera hookeri |
Hooker’s orchid |
| Platanthera lacera |
ragged green fringed orchid |
| Platanthera leucophaea |
prairie white fringed orchid |
| Platanthera orbiculata |
large round-leaved orchid |
| Platanthera peramoena |
purple fringeless orchid |
| Platanthera psycodes |
small purple fringed orchid |
| Platanthera psycodes var. grandiflora |
large purple fringed orchid |
| Pogonia ophioglossoides |
rose pogonia |
| Spiranthes cernua |
nodding ladies’-tresses |
| Spiranthes lacera var. lacera |
northern slender ladies’-tresses |
| Spiranthes lucida |
shining ladies’-tresses |
| Spiranthes magnicamporum |
great plains ladies’-tresses |
| Spiranthes ochroleuca |
yellow nodding ladies’-tresses |
| Spiranthes romanzoffiana |
hooded ladies’-tresses |
| Spiranthes tuberose |
slender ladies’-tresses |
| Spiranthes vernalis |
spring ladies’-tresses |
| Tipularia discolor |
cranefly orchid |
| Triphora trianthophora |
three birds orchid |