| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Orchidaceae | Spiranthes lacera var. gracilis | Southern Slender Ladies'-tresses | Fields, meadows, pastures, woodlands, occasionally glade margins. | ME, MI, WI, and KS south to GA and TX. |  |
| Orchidaceae | Spiranthes lacera var. lacera | Northern Slender Ladies'-tresses | Clearings, openings, barrens, open woodlands and dry woodland edges. | NS and NB west to SK, south to sw. NC, w. VA, TN, and MO. The occurrence of this species in NC is documented by a specimen at DUKE, collected at 5200 feet elevation on Tusquitee bald. |  |