Rhizomes ascending to erect, 0-5(-20) mm. Staminate spikes 5-8.5 × 0.8-1.3 mm; staminate scales from median portion of spike 2.8-4 × 0.6-1.9 mm, midrib prominent, usually elevated and extending to apex of scale, usually with small teeth (15X). Perigynia 2.3-3.3 × 0.8-1.2 mm; beak with apical teeth 0.1-0.3 mm. 2n = 40. Fruiting early May-mid Jun. Mesic to rich moist soils on slopes in partial shade of hardwoods, occasionally in drier sites of sandy loam under mixed hardwood-pine, in richer soils than other varieties; 50-900 m; N.B., N.S., Ont., Que.; Ark., Conn., Del., Fla., Ga., Ill., Ind., Ky., Maine, Md., Mass., Mich., Mo., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Vt., Va., W.Va., Wis.