Allium tricoccum var. burdickii
Rhodora 55: 243. 1953.
Bulbs mostly 2–4(–5) × 1–1.5 cm. Leaf blade (1.5–)2–4(–4.5) cm wide, scarcely petiolate or less strongly so than in var. tricoccum, sheaths and petioles not anthocyanous. Scape (10–)13–16(–18) cm. Umbel (6–)12–18(–24)-flowered; spathe bracts 1–2 cm. 2n = 16.
Phenology: Flowering early Jun.
Habitat: Dry soil in upland woods
Elevation: 0–1800 m
Ont., Que., Ala., Ga., Ill., Ind., Iowa, Ky., Maine, Mich., Minn., Mo., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Pa., S.Dak., Tenn., Vt., Va., W.Va., Wis.
Allium tricoccum var. burdickii is apparently rare in the eastern part of its range and in the Ozark Plateau region.
With its overlapping characteristics and distribution, Allium tricoccum var. burdickii is doubtfully separate from var. tricoccum.