Herbs perennial, 30--60 cm tall. Stems erect from procumbent base, terete, reddish brown, usually simple, with multicellular hairs. Leaves opposite, occasionally alternate in upper part of stem, sessile or subsessile. Lower leaves smaller, ovate to scalelike. Medial and upper leaves ovate-lanceolate to lanceolate, 4--8 X 1--4 cm, initially sparsely bristly, abaxially sparsely reddish or black glandular punctate and puberulous veined, adaxially becoming glabrescent, base rounded, apex acuminate; veins 3 or 4 pairs; veinlets inconspicuous. Pedicel filiform, 1.5--7 cm, densely pubescent. Flowers solitary, axillary. Calyx lobes linear-lanceolate, 5--7 mm, pubescent, apex acuminate. Corolla yellow, rotate, 1.2--2 cm in diam.; tube ca. 1.5 mm; lobes ovate-elliptic to elliptic-lanceolate, 6--8 X 3.5--6 mm, sparsely red or brown glandular, apex acute. Filaments 3--4 mm, connate basally into a ring; anthers linear, dorsifixed, opening by lateral slits, ca. 2 mm. Ovary glabrous; style ca. 5 mm. Capsule subglobose, ca. 3 mm in diam. Fl. Jun.
Home