Corallorhiza multiflora Nuttall; C. multiflora var. sulphurea Suksdorf; C. vancouveriana Finet

Inflorescences: floral bracts 0.5–1 × 0.5–9 mm, usually entire. Flowers: middle lobe of lip expanded slightly or not at all distally, ratio of width of dilated part to base of middle lobe less than 1.5; lip 3.3–7 × 1.5–4.5 mm; column curved, 3.3–5.5 × 0.7–1 mm at stigma; stigmatic surface elliptic-oblong to nearly square, 0.7 × 1 mm.

Flowering May--Aug. Moist to dry coniferous and deciduous woods, and conifer plantations, often in florests with little other herbaceous cover; 0--3700 m; St. Pierre and Miquelon (variety unconfirmed); Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Sask.; Ariz., Calif., Colo., Conn., Del., D.C., Ga., Idaho, Ill., Ind., Iowa, Maine, Md., Mass., Mich., Minn., Mont., Nev., N.H., N.J., N.Mex., N.Y., N.C., Ohio, Oreg., Pa., R.I., S.C., Tenn., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.