Stems 25-100 cm tall, sparsely villous, puberulent, branched. Petiole 1-2 cm; leaf blade ovate to ovate-lanceolate, 2-5 × 1-2.5 cm, papery, pilose, abaxially sparsely impressed glandular, base rounded to broadly cuneate, margin serrulate, apex acute. Racemes 2.5-4.5 cm in flower, to 8 cm in fruit, finely pilose; bracts minute, ovate-lanceolate, to slightly longer than pedicels. Pedicel ca. 1 mm. Calyx ca. 1.2 × 1.2 mm, dilated in fruit, pilose outside; upper teeth minute, triangular; lower teeth slightly longer. Corolla purple or reddish, ca. 2.5 mm, pubescent outside, lower lip slightly longer than upper lip. Nutlets gray-brown, globose, ca. 1.5 mm in diam., loosely netted, glabrous. Fl. Sep-Nov, fr. Oct-Dec.
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