Herbs or shrublets, 20-30 cm tall, sometimes stoloniferous. Stems obtusely 4-sided, glandular puberulous or glabrescent. Petiole (0.5-)1.2(-3) cm, puberulous; leaf blade obovate to elliptic, (2.5-)6(-14) × 2.5-4.5 cm, papery to submembranous, abaxially scattered setose on veins, adaxially remotely setose between veins and sometimes with white, orbicular patches (maculae), secondary veins 1 or 2 on each side of midvein, base cuneate to obtuse and sometimes slightly oblique, margin serrulate with each tooth having a terminal seta, apex acuminate to acute. Inflorescences terminal, scorpioid cymes, 1.5-3.5 cm, furfuraceous, glabrescent; peduncle 0.7-2 cm, 4-angled. Pedicel 1-3 mm, sparsely furfuraceous and with glandular trichomes. Hypanthium funnel-shaped, 5-6 mm, 3-sided, 6-ribbed. Calyx lobes broadly triangular, less than 1 mm, apex acute. Petals purple, oblong, 5.5-10 × 2.5-6 mm, apex acute with 1 glandular trichome at tip. Stamens 3, equal, 5.5-12 mm; anthers 3-7 mm. Ovary flask-shaped to cup-shaped, apex with a membranous 3-lobed crown. Capsule campanulate, 3-sided; hypanthium 6-8 × 4-6 mm, furfuraceous or glabrescent. Fl. Jun-Sep, fr. Aug-Dec.
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A herb. It grows 20-30 cm tall. It can have runners. The stems are 4 sided. The leaves are oval and 6 cm long by 3-5 cm wide. There are teeth along the edge. The flowering shoots are at the end of stems. The fruit is a 3 sided capsule.
It grows in thickets, on hill sides and along streams in damp shaded places between 100-1,300 m above sea level in southern China. In Yunnan.
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