Herbs. Stems erect, <clustered on vertical caudex>, (12–)20–50(–67) cm, <simple or branched>, stellate-pubescent to stellate-tomentose. Leaves cauline; petiole 1–4 mm; blade narrowly elliptic to oblanceolate, (10–)18–32(–40) × 4–7(–10) mm, surfaces stellate-tomentose abaxially, stellate-pubescent adaxially, without simple hairs, lateral veins raised abaxially. Inflorescences terminal, cymes; chasmogamous flowers 6–10(–18) per cyme; cleistogamous in glomerules, 1–10 flowers per glomerule, <on lateral leafy branches 2.5–6 cm, flowering 1–3 months later than chasmogamous>. Pedicels (1.5–)3–8(–12) mm; bracts 3–7 × 0.5–1 mm. Chasmogamous flowers: outer sepals linear, 3.5–4.5(–8) × 0.4–1 mm, inner sepals <ovate-elliptic>, 5–8 × 2.4–4 mm, apex acute; petals obovate, 8–12 × 5–10 mm; capsules 3–5.5 × 2.5–4.5 mm, glabrous. Cleistogamous flowers: outer sepals linear, 0.5–1.5 × 0.3 mm, inner sepals ovate-elliptic, 1.7–2.8 × 1.5–2.3 mm, apex acute capsules 1.5–2.2 × 1.2–2.2 mm, glabrous.
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