Contr. U.S. Natl. Herb. 16: 173. 1913.
Herbs, perennial, 5–11 dm; herbage light green to dark green, puberulent, more densely distally. Leaves: petiole length 1/6–1/3 blade; blade lanceolate to ovate, 4–7(–8) cm, length 2–3 times width, base truncate, margins dentate. Pedicels slender, glabrate or stipitate-glandular. Flowers: corolla red to green, unicolored or ± bicolored, paler abaxially, 6–8 mm, throat ± open; staminode obovate, length usually greater than width. 2n = 92.
Phenology: Flowering Jul–Oct.
Habitat: Coniferous forests, riparian areas.
Elevation: 1500–3100 m.