Stems erect, to 2 m, glabrous, or minutely glandular in the infl, the sides flat or shallowly grooved; petioles 1.5–3 cm, rarely a third as long as the blade, narrowly margined to the base; blades ovate or lance-ovate, 8–20 cm, sharply serrate or incised or doubly serrate, acuminate, truncate to broadly rounded at base, glabrous beneath; infl 1–3 dm, tending to be cylindric, rarely over 8 cm wide; cor 7–11 mm, dull reddish-brown except the yellowish-green lower lobe, sterile filament yellowish-green, roundly dilated at the summit, often wider than long; fr dull brown, 6–10 mm; 2n=92–96. Open woods, roadsides, and fence-rows; Que. and N.S. to B.C., s. to Va., Mo., and N.M. Late May–July. (S. leporella; S. occidentalis)
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