Shrublets or herbs, to 25 cm tall, basally branched, base woody. Stems 4-sided, densely patently setose. Petiole 1.5-3.5 cm; leaf blade ovate, 5-8 × 2.5-4 cm, papery to stiffly papery, abaxially patently long setose on veins, adaxially setose strigose, secondary veins 3 or 4 on each side of midvein, base subcordate to cordate, margin double serrulate with each tooth having a terminal seta, apex acuminate. Inflorescences terminal, umbellate, 3-7-flowered; peduncle short; bracts 2, foliaceous. Flowers 3-merous. Pedicel 5-10 mm, with patent glandular trichomes. Hypanthium funnel-shaped, 3-sided, ca. 3.5 mm. Calyx lobes 3, broadly triangular, ca. 2.5 mm, with glandular trichomes, margin ciliate, apex abruptly acuminate. Petals purplish, obovate, ca. 7 × 4 mm, glabrous, apex abruptly acuminate with a setose tip. Stamens 6, ca. 1.2 cm, equal; connective decurrent, forming a short spur, not tuberculate. Ovary ovoid, 3-lobed, apex with a membranous crown; persistent calyx lobes triangular, margin entire. Fr. Aug.
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