Bulbs mostly 4-6 × 1.5-3 cm. Leaf blade (3-)5-9 cm wide, evidently petiolate, sheaths and petioles commonly anthocyanous. Scape (12-)25-35 cm. Umbel (15-)30-50-flowered; spathe bracts 2-3 cm. 2n = 16. Flowering Jul--Aug. Moist ground in rich woods, depressions, streamside bluffs, and colluvial slopes; 0--1400 m; N.B., N.S., Ont., Que.; Ala., Conn., Del., D.C., Ga., Ill., Ind., Iowa, Ky., Maine, Md., Mass., Mich., Minn., Mo., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Pa., R.I., S.C., S.Dak., Tenn., Vt., Va., W.Va., Wis.
From Flora of Indiana (1940) by Charles C. Deam
Infrequent to rare in moist, rich soil throughout the state, although there are no records from the southwestern counties. It seems to prefer slopes and woods near streams and it is most often found associated with beech and sugar maple.
Indiana Coefficient of Conservatism: C = 7
Wetland Indicator Status: FACU
Plants larger, the bulb mostly (1.5-)2-3 cm thick, the lvs (3-)5-8+ cm wide, evidently petiolate, the scape arising (12-)25-35 cm above the ground, the bracts subtending the infl 2-3 cm, the fls (15-)30-50+, the fruiting pedicels (1-)1.5-2.5+ cm; sheaths and petioles and often also the scape and bracts commonly anthocyanic; range of the sp.; fl late, commonly July.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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