Stems erect, to 3 m, glabrous below, sparsely glandular in the infl, the sides, especially in older parts, roundly angled and prominently grooved; petioles slender, not margined, 1.5-5 cm, the main ones mostly a third to half as long as the blade; blades ovate to lance-ovate, to 25 cm, acuminate, serrate, broadly rounded to shallowly cordate at base; infl loosely and irregularly branched, tending to be pyramidal, often 10-15 cm wide; cor 5-8 mm, reddish-brown; sterile stamen dark purple or brown, narrowly dilated, commonly longer than wide; fr 4-7 mm, somewhat shining; 2n=ca 86. Open woods; Que. to Minn., s. to S.C. and La. July, Aug., the period rarely overlapping that of no. 1. (S. neglecta) [Scrophularia lanceolata Pursh]
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.