Herbs perennial, glabrous, 30--50 cm tall. Stems erect, fleshy, usually simple, black glandular punctate. Lower leaves scalelike. Upper leaves opposite, upper 2 pairs compactly crowded, appearing verticillate; petiole 0.5--2.5 cm; leaf blade elliptic to broadly elliptic or rhomboid-ovate, 6--18 X 3--10(--12.5) cm, densely minutely black glandular punctate, base broadly cuneate, apex acute to short acuminate; veins 4--6 pairs; veinlets inconspicuous. Racemes terminal, abbreviated, nearly capitate; bracts ovate-lanceolate to lanceolate, 1--1.5 cm, densely glandular punctate. Pedicel 0.5--6 mm. Calyx lobes oblong-lanceolate, 6--12 X 2--3.5 mm, densely black glandular punctate. Corolla yellow, 1.2--1.9 cm; tube 4--5 mm; lobes oblong to oblong-lanceolate, black glandular punctate, apex obtuse or acute. Filaments connate basally into a ca. 3 mm high tube, free parts 3--4 mm; anthers ovate, dorsifixed, opening by lateral slits, ca. 1 mm. Ovary glabrous; style ca. 7 mm. Capsule subglobose, 3--4 mm in diam., black glandular. Fl. May.
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