Leaves: blade 0.9-2 × 0.7-2 cm. Flowers yellow-green, green, or reddish purple; pedicels 2 m; sepals 2-3 × 0.5-1.5 mm; petals 1.5-2.5 × 0.5-1 mm; lip 3-4 × 1-1.5 mm. 2n = 36, 38, 40, 42. Flowering late May--Aug. Mountainous regions in mossy, damp, coniferous or mixed coniferous-hardwood forests, sphagnum bogs and evergreen swamps, and subacid humus in moist woodlands; 0--1200 m; Greenland; St. Pierre and Miquelon; Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon; Conn., D.C., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., Vt., Va., W.Va., Wis.; Europe; Asia (Japan); Iceland.