| 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 |  |
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