Erect perennial herb 20–140 cm high, with numerous leafy stolons from base; stems exfoliating and often woody near base, covered with dense, long, spreading hairs and usually also with erect and glandular hairs. Leaves usually alternate, linear to narrowly lanceolate, 1.5–8 cm long, 2–10 mm wide, sessile, margins sometimes undulate with distinct sparse teeth, often on distal parts only. Flowers with a conspicuous ring of long hairs inside the hypanthium; sepals linear to linear-lanceolate, 3–5 mm long; petals white or purplish-pink, 3–8 mm long. Capsule 3.5–6 cm long, densely pubescent, with a mixture of long spreading hairs and short glandular hairs; pedicel to 1.5 cm long; seeds 0.9–1.1 mm long, papillose, comose. Flowers mainly Oct.–Apr.