| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|
| Orchidaceae | Aplectrum | Puttyroot, Adam-and-Eve | | | 
|
| Orchidaceae | Arethusa | Dragon's-mouth, Bog-rose, Arethusa | | | 
|
| Orchidaceae | Aspidogyne | Jug Orchid | | | 
|
| Orchidaceae | Basiphyllaea | Crab Orchid | | | 
|
| Orchidaceae | Beloglottis | | | | 
|
| Orchidaceae | Bletia | Bletia | | | 
|
| Orchidaceae | Bletilla | Bletilla | | | 
|
| Orchidaceae | Brassia | | | | 
|
| Orchidaceae | Bulbophyllum | Rattailed Orchid | | | 
|
| Orchidaceae | Calopogon | Grass-pink | | | 
|
| Orchidaceae | Camaridium | | | | 
|
| Orchidaceae | Campylocentrum | Bentspur Orchid | | | 
|
| Orchidaceae | Cleistesiopsis | Spreading Pogonia, Rosebud Orchid | | | 
|
| Orchidaceae | Corallorhiza | Coralroot | | | 
|
| Orchidaceae | Cranichis | Helmet Orchid | | | 
|
| Orchidaceae | Cyclopogon | Green Ladies’-tresses | | | 
|
| Orchidaceae | Cymbidium | Boat Orchid | | | 
|
| Orchidaceae | Cypripedium | Lady's-slipper | | | 
|
| Orchidaceae | Cyrtopodium | | | | 
|
| Orchidaceae | Cyrtosia | | | | 
|
| Orchidaceae | Dactylorhiza | Frog Orchid, Long-bracted Orchid | | | 
|
| Orchidaceae | Dendrophylax | | | | 
|
| Orchidaceae | Diteilis | | | | |
| Orchidaceae | Eltroplectris | | | | 
|
| Orchidaceae | Encyclia | Butterfly Orchid | | | 
|
| Orchidaceae | Epidendrum | Green-fly Orchid | | | 
|
| Orchidaceae | Epipactis | Helleborine | | | 
|
| Orchidaceae | Eulophia | | | | 
|
| Orchidaceae | Galeandra | | | | 
|
| Orchidaceae | Galearis | Showy Orchis | | | 
|
| Orchidaceae | Goodyera | Rattlesnake Orchid | | | 
|
| Orchidaceae | Govenia | Gowen’s Orchid, Govenia | | | |
| Orchidaceae | Habenaria | Longspur Orchid, Habenaria | | | 
|
| Orchidaceae | Heterotaxis | | | | 
|
| Orchidaceae | Hexalectris | Crested Coralroot | | | 
|
| Orchidaceae | Ionopsis | Ionopsis | | | 
|
| Orchidaceae | Isotria | Whorled Pogonia, Five-leaves, Fiveleaf Orchid | | | 
|
| Orchidaceae | Laelia | Laelia | | | 
|
| Orchidaceae | Lepanthopsis | Lepanthopsis | | | 
|
| Orchidaceae | Liparis | Wide-lip Orchid, Twayblade | | | 
|
| Orchidaceae | Macradenia | | | | 
|
| Orchidaceae | Malaxis | Adder's-mouth | | | 
|
| Orchidaceae | Mesadenus | | | | 
|
| Orchidaceae | Neottia | Twayblade | | | 
|
| Orchidaceae | Oeceoclades | Monk Orchid | | | 
|
| Orchidaceae | Oncidium | Oncidium | | | 
|
| Orchidaceae | Orthochilus | Wild Coco | | | 
|
| Orchidaceae | Pelexia | Pelexia | | | 
|
| Orchidaceae | Phaius | | | | 
|
| Orchidaceae | Platanthera | Fringed Orchid, Fringeless Orchid | | | 
|
| Orchidaceae | Pogonia | Rose Pogonia, Pogonia | | | 
|
| Orchidaceae | Polystachya | | | | 
|
| Orchidaceae | Ponthieva | Shadow Witch | | | 
|
| Orchidaceae | Prescottia | | | | 
|
| Orchidaceae | Prosthechea | | | | 
|
| Orchidaceae | Restrepiella | | | | 
|
| Orchidaceae | Sacoila | | | | 
|
| Orchidaceae | Spathoglottis | | | | 
|
| Orchidaceae | Spiranthes | Ladies'-tresses, Pearl-twist, Spiral Orchid | | | 
|
| Orchidaceae | Stelis | | | | 
|
| Orchidaceae | Tetramicra | Wallflower Orchid | | | 
|
| Orchidaceae | Tipularia | Cranefly Orchid | | | 
|
| Orchidaceae | Tolumnia | Variegated Oncidium | | | 
|
| Orchidaceae | Trichocentrum | | | | 
|
| Orchidaceae | Triphora | Three Birds Orchid, Nodding-caps | | | 
|
| Orchidaceae | Tropidia | | | | 
|
| Orchidaceae | Vanilla | Vanilla | | | 
|
| Orchidaceae | Zeuxine | Soldier Orchid | | | 
|