Stems prostrate-ascending, 20-70 cm, densely spreading villous to glandular floccose-villous, sometimes subglabrous. Petiole 0.5-3 cm; leaf blade ovate-lanceolate to ovate, (1-)3-10 × (1-)2.5-5 cm, puberulent on veins, adaxially sparsely appressed minutely hispid, abaxially subglabrous, base broadly cuneate, margin coarsely remote serrate, apex acute. Racemes 4-20 cm; bracteoles lanceolate, 4-10 mm, ciliate. Pedicel ca. 5 mm. Calyx ca. 4 mm, glandular puberulent; upper lip ca. 3 mm, teeth triangular, apex mucronate; lower lip ca. 2.5 mm, teeth narrowly triangular, subulate; fruiting calyx conspicuously veined, declinate, to 1.2 cm; teeth of upper lip to 4 mm, teeth of lower lip narrow lanceolate, ca. 2 mm. Corolla reddish to purplish blue, tubular, to 2.5 cm, ± straight, throat slightly dilated; upper lobes ovate, subequal, ca. 3 mm; lower lip 4-9 mm, subcircular, slightly concave, margin entire. Stamens included, anterior 2 inserted on or near throat of corolla. Nutlets yellow-brown, ovoid, ca. 1.5 mm wide. Fl. Jul-Oct, fr. Oct-Nov.
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