Allium schoenoprasum L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Bulb slender, often scarcely thicker than the stem; lvs erect, terete, hollow, mostly cauline, 2–4 mm thick, the longest nearly equaling the stout, 2–5 dm stem; umbel compact, hemispheric, subtended by 2 ovate bracts; pedicels 3–7 mm; fls numerous; tep bright pink, ovate to lanceolate, 10–14 mm, acuminate, prominently 1-nerved; filaments all about alike, barely widened at base; fr ovoid, 3-lobed, half as long as the perianth; 2n=16, 24, 32. Circumboreal, in Amer. s. to Me., n. N.Y., n. Mich., Minn., Colo., and Wash. June, July. Our native plants, as described above, are var. sibiricum (L.) Hartman. Var. schoenoprasum, a much smaller European plant only 1–2 dm, with the lvs basal and only 1–2 mm thick, is the cult. chives; it rarely escapes in our range.