Herbs perennial, to 30 cm tall. Stems erect, terete, usually branched from base, densely rust-colored villous. Leaves opposite, upper 2 pairs crowded, forming a whorl; petiole 3--5 mm, narrowly winged by decurrent leaf blade; leaf blade broadly ovate, 2.5--8 X 0.6--6 cm, bristly especially on abaxial veins, densely black glandular punctate, base cuneate to rounded, obscurely repand, apex acute. Racemes terminal, abbreviated, subcapitate; bracts linear, ca. 1.5 cm, black glandular. Pedicel 1--2 mm, densely rust-colored villous. Calyx lobes linear-lanceolate, 9--10 X 1.5--2 mm, with long hairs on midvein and margin. Corolla yellow, deeply parted, ca. 1.5 cm in diam.; lobes oblong, ca. 9 mm, sparsely minutely black glandular punctate, apex rounded. Filaments connate basally into a ca. 3 mm high tube, free parts 3--5 mm; anthers oblong, dorsifixed, opening by lateral slits, ca. 1.5 mm. Ovary glabrous, black glandular. Capsule unknown.
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