Herbs perennial, to 45 cm tall. Stems ascending-erect from prostrate lower part, terete, subfleshy, simple or branched, scurfy glandular on upper part. Leaves opposite, upper 2 pairs ± crowded; petiole 1--2 cm, narrowly winged; leaf blade ovate to ovate-elliptic, 3.5--8 X 1.8--5 cm, abaxially glabrous and densely minutely black glandular punctate, adaxially sparsely strigillose or glabrescent, base broadly cuneate to subrounded, apex acute; veins 4--6 pairs; veinlets invisible. Inflorescences terminal, subcapitate, 2--6-flowered; bracts ovate, longer than calyx. Pedicel ca. 3 mm, scurfy glandular. Calyx lobes lanceolate, 8--13 X 2.5--3.5 mm, densely black glandular punctate; midvein distinctly raised; veins 3. Corolla yellow; tube ca. 5 mm; lobes oblong, 8--11 X 3--6 mm, adaxially glandular, apex rounded. Filaments connate basally into a ca. 4 mm high tube, free parts 2--3 mm; anthers ovate, dorsifixed, opening by lateral slits, ca. 2 mm. Ovary glabrous; style 7--8 mm. Capsule subglobose, ca. 7 mm in diam. Fl. May-Jul.
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