Centaurium pulchellum (Sw.) Druce
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Annual, much branched, often from the base, to 2 dm, without a rosette; principal lvs sessile, lanceolate or lance-ovate, 1–2 cm; infl many- fld, comparatively dense, with short internodes; pedicels mostly 3–5 mm; cal ca 9 mm; cor-tube slightly exceeding the cal, its lobes pink, 4 mm; anthers oval, under 1 mm, not coiled; 2n=36. Native of Eur., locally intr. in fields and waste places in our range. June–Sept.