Inflorescences lax, slender (in part from floral bracts usually shorter than flowers); lip (excluding auricles) subquadrangular, suborbiculate, or broadly ovate, obtuse or often emarginate. Flowering Mar--Oct. Floodplain forests, hardwood, white-cedar, and cypress swamps, riparian thickets, wet meadows; 0--300 m; N.S., Ont.; Ala., Ark., D.C., Fla., Ga., Ill., Ind., Ky., La., Miss., Mo., N.C., Okla., S.C., Tenn., Tex., Va.