Stems rather stout, simple or usually somewhat branched above with ascending branches, smooth, 1 to 3 feet high. Leaves sessile, opposite or some of them alternate, narrowly lanceolate, 2 to 5 inches long, the lower ones deeply lobed, the lobes oblong, blunt, short and crenately toothed, with a thickened margin. Flowers pale yellow, three-fourths to 1 inch long, in short clusters or spikes at the ends of the stems and branches, the flowers subtended by the upper reduced leaves. Calyx two-lobed, the lobes with toothed leaflike margins. Corolla with a slender tube and deeply two-lipped, the upper lip (galea) laterally compressed, arched and terminated by a short, blunt beak, the lower lip three-lobed, erect-ascending, the middle lobe smallest. Stamens four, attached to the inside of the corolla tube and ascending within the upper lip but not projecting out of the flower. Fruit a small, ovate capsule as long as or but slightly longer than the calyx.
Memoir 15 N. Y. State Museum
A. Swamp Lousewort - Pedicular is lanceolata