Coarse, erect, often freely branched winter-annual or biennial, mostly 0.5–2 m; lvs thin, lanceolate to ovate-oblong, 7–15 cm including the margined petiole, acuminate, serrate; spike(s) 1–4+ dm, the lower bracts lf-like, the upper reduced; fls blue, solitary or in small clusters, the rotate cor 2.5 cm wide; sep linear, spreading, 5–10 mm; pollen pantoporate (unique among our spp.); style down-curved, with upcurved tip; fr 7–12 mm, opening by round pores near the top; 2n=58. Moist borders and open woods; Ont. to Minn., s. to Fla. and Okla. July–Sept. (Campanulastrum a.)
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