Plants 18-45 cm. Leaves 2, in subequal basal pair, spreading-ascending or lying on ground; bracts 0(-1, very rarely); blade orbiculate, broadly elliptic, or obovate, 5-17 × 4-13 cm. Spikes lax. Flowers resupinate, not showy; calyx green; corolla commonly yellowish green; lateral sepals reflexed; petals narrowly lanceolate-falcate, margins entire; lip projecting to porrect, lanceolate to narrowly lance-rhombic, without basal thickening, 8-23 × 1-6 mm, margins entire; spur slenderly conic, 11-27 mm; rostellum lobes very wide-spreading, angular; pollinaria nearly straight; pollinia remaining enclosed in anther sacs; viscidia suborbiculate; ovary slender to rather stout, mostly 8-20 mm. 2n = 42. Flowering May--Aug. Dry to mesic coniferous and deciduous forest; mostly 0--500 m; Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que.; Conn., Ill., Ind., Iowa, Maine, Mass., Mich., Minn., Ohio, Pa., N.H., N.J., N.Y., R.I., Vt., Wis.