Shrubs 30-100 cm tall, much branched. Branchlets grayish when young, becoming dark gray, dark striate. Petiole slender, 1-2 mm, puberulent; leaf blade ovate-lanceolate, ovate, or subrounded, (2.5-)5-6 X (0.3-)1-1.5 cm, abaxially puberulent on veins, adaxially dark green and minutely hirsute, yellow glandular, base cuneate to subrounded, margin entire or serrate, apex obtuse; veins 2 or 3 pairs, abaxially elevated. Inflorescences 2-4(-6)-flowered; peduncle 1-2 mm; bracts linear. Calyx ca. 5 mm, 5-dentate to middle, puberulent, glandular. Corolla purplish, ca. 6 mm, 2-lipped, tube outside glabrous and glandular; lower lip with 3 rounded lobes; upper lip rounded, lobes densely puberulent, glandular. Ovary black-brown, obovate, ca. 1.5 mm, glabrous, apically glandular. Style capillary, puberulent. Fruit black. Fl. and fr. Jun-Oct.
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