Herbs. Stems scattered on horizontal rootstocks, ascending to erect, 10–27(–35) cm, stellatepubescent to stellate-tomentose. Leaves cauline; petiole 2–5 mm; blade narrowly elliptic to oblanceolate, gradually narrowed to base, 10–30 × 3–6(–8) mm, surfaces stellatetomentose abaxially, stellate-pubescent adaxially, without simple hairs, lateral veins raised abaxially. Inflorescences terminal, cymes; chasmogamous flowers 2–6 per cyme, cleistogamous in glomerules, 1–6 flowers per glomerule, on lateral leafy branches 1–3 cm, flowering 1–3 months later than chasmogamous. Pedicels (2–)8–14(–22) mm; bracts 1.5–3.5 × 0.3 mm. Chasmogamous flowers: outer sepals linear, 1–3(–4) × 0.4–0.9 mm, inner sepals <ovate-elliptic>, 5–8 × 2.3–4.5 mm, apex acute; petals obovate, 8–10(–13) × 6–12 mm; capsules 3.7–5.3 × 3–4 mm, glabrous. Cleistogamous flowers: outer sepals rudimentary, 0.2–0.5 × 0.2 mm, inner sepals ovate, 2–2.5 × 1.5–2.2 mm, apex acute; capsules 1.5–2.2 × 1.3–2 mm, glabrous.
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