| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Orchidaceae | Platanthera aquilonis | Bog Orchid | Bogs and swampy forests. | Greenland and Iceland to AK, south to n. NJ, nw. PA, c. OH, IN, IL, IA, NE, NM, UT, ID, and OR. |  |
| Orchidaceae | Platanthera blephariglottis | Small White Fringed Orchid | Seepages, sandhill-pocosin ecotones. | NL (Newfoundland) west to MI and IL, south to GA. |  |
| Orchidaceae | Platanthera chapmanii | Chapman's Orange-fringed Orchid | Pine savannas. | S. GA and n. FL; e. TX. |  |
| Orchidaceae | Platanthera ciliaris | Yellow Fringed Orchid | Pine savannas, moist roadbanks, meadows, pastures, bogs, marshes. | NH, MI, IL, MO, and OK south to c. peninsular FL and e. TX. |  |
| Orchidaceae | Platanthera clavellata | Small Green Wood Orchid, Green Woodland Orchid | Seepages, bogs, swamps, other wet places. | NL (Newfoundland) and ND south to Panhandle FL and TX. |  |
| Orchidaceae | Platanthera conspicua | Large White Fringed Orchid | Pine savannas, seepages, longleaf pine sandhill-pocosin ecotones. | NC south to c. peninsular FL, west to e. TX. |  |
| Orchidaceae | Platanthera cristata | Crested Fringed Orchid, Golden Fringed Orchid | Pine savannas, bogs, moist roadsides. | P. cristata is more limited to the Coastal Plain than the related P. ciliaris, ranging from s. MA south to FL and west to e. TX, and also inland in KY, TN, AR, SC, and NC. |  |
| Orchidaceae | Platanthera dilatata var. dilatata | White Northern Bog-orchid, Tall White Bog Orchid, Bog Candles | Bogs, marshes, wet meadows, circumneutral to rich fens. | NS south to PA, west to Manitoba, south to n. IL; AK south to CA, east to CO; Iceland and Greenland. |  |
| Orchidaceae | Platanthera flava var. flava | Southern Rein Orchid, Southern Gypsy-spike | Shaded wet places, such as swampy forests. | NJ, IN, IL, MO, and OK, south to c. peninsular FL and e. TX; remarkably disjunct in s. NS, where it occurs associated with other disjuncts from the Southeastern Coastal Plain. Reported for MD (Longbottom, Naczi, & Knapp 2016). |  |
| Orchidaceae | Platanthera flava var. herbiola | Tubercled Rein Orchid, Northern Gypsy-spike | Bogs, seepages. | NS, QC, and MN south to NC, GA, TN, and MO. |  |
| Orchidaceae | Platanthera grandiflora | Large Purple Fringed Orchid, Plume-royal | Bogs, seepages, moist places at high elevations. | NL (Newfoundland) and ON south to NJ, OH, and MI, and south in the mountains to w. NC and ne. GA |  |
| Orchidaceae | Platanthera hookeri | Hooker's Orchid | Rich moist forests. | NS and NF west to MB, s to n. NJ, sw. PA, nw. VA (Rockingham County), sc. OH, n. IN, n. IL, and c. IA. |  |
| Orchidaceae | Platanthera huronensis | Tall Green Bog Orchid | Wet meadows, bogs, and seepy swamps. | NL, QC, ON, and AK south to ne. PA, nw. PA, s. MI, s. WI, IA, sw. SD, AZ, UT, and OR. |  |
| Orchidaceae | Platanthera integra | Golden Fringeless Orchid, Yellow Fringeless Orchid | Wet pine savannas in the Coastal Plain, bogs in the Mountains and Piedmont. | Essentially endemic to the Southeastern Coastal Plain, ranging from s. NJ south to FL and west to se. TX, with disjunct occurrences in TN (Eastern Highland Rim, Cumberland Plateau) and in bogs in the Piedmont and at low elevations of the Blue Ridge of NC. It is apparently now extirpated in the Mountains and Piedmont of NC. |  |
| Orchidaceae | Platanthera integrilabia | Monkey-face Orchid, White Fringeless Orchid | Bogs, red maple-gum swamps, seeps, and streambanks. | Endemic to KY, e. TN, sw. VA (Lee County, documentation uncertain), w. NC, nw. SC, n. and wc. GA, n. and c. AL, and n. MS, primarily in the Cumberland Plateau. |  |
| Orchidaceae | Platanthera lacera | Green Fringed Orchid, Ragged Fringed Orchid, Ragged Orchid | Swamps, bogs, seepages, marshes. | NL (Newfoundland) west to MB, south to SC, GA, s. AL, w. LA, and ne. TX. |  |
| Orchidaceae | Platanthera leucophaea | Prairie Fringed Orchid | Damp calcareous meadows. | ME west to NE, south to w. VA, nw. PA, c. OH, c. IN, IL, MO, and OK. |  |
| Orchidaceae | Platanthera macrophylla | Dinner-plate Orchid | Moist forests. | NF west to ON, south to PA and MI. |  |
| Orchidaceae | Platanthera nivea | Snowy Orchid, Bog-spike | Wet pine savannas, acid seepages, Catahoula barrens (in e. TX). | Essentially a Southeastern Coastal Plain endemic, P. nivea ranges from s. NJ and DE (at least formerly) south to FL and west to e. TX and e. AR; disjunct inland in Coffee County, TN (Eastern Highland Rim) and w. SC (in the uppermost Piedmont in the Blue Ridge Escarpment edge). |  |
| Orchidaceae | Platanthera orbiculata | Large Round-leaved Orchid, Dessert-plate Orchid | Moist hardwood forests and seeps, especially over mafic, calcareous, or other more nutrient-rich substrates. | NL (Newfoundland) and NL (Labrador) west to AK, south to PA (and in the mountains to NC and TN), OH, IN, MN, SD, and OR. |  |
| Orchidaceae | Platanthera peramoena | Purple Fringeless Orchid, Purple Spire Orchid, Pride-of-the-peak | Bogs, seepages, moist forests, moist meadows. | NJ, s. PA, OH, c. IL, and se. MO south to nw. SC, n. GA, n. AL, c. MS, and c. AR. |  |
| Orchidaceae | Platanthera praeclara | Great Plains White Fringed Orchid | Mesic prairies, on loess or calcareous substrates. | MN, MB, and ND south through IA, SD, MO, NE, and e. KS to ne. OK. | |
| Orchidaceae | Platanthera psycodes | Small Purple Fringed Orchid, Butterfly Orchid | Northern hardwood forests, other moist forests, seepages, bogs. | NL (Newfoundland) and MB, south to n. GA, TN, and MO. |  |
| Orchidaceae | Platanthera shriveri | Shriver’s Purple Fringed Orchid, Shriver’s Frilly Orchid | Seepages, northern hardwoods forests, roadbanks. | Sw. PA south through w. MD, e WV, and w. VA to nw. NC. First reported for MD by Knapp et al. (2011). |  |
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