Stems 10–60 cm, glandular below inflorescence, glands dome-shaped to conical, 1/2–2 times longer than wide, often intermixed with cylindrical hairs 2–4 times longer than wide; sometimes only cylindrical hairs present. Inflorescences spikelike, 3–21-flowered, forming cylindrical-ovoid heads, sometimes interrupted or open, 1–6 cm; bracteoles rarely glandular. Flowers: tepals 3.5–6 mm; stamens 3.5–5 mm; styles 0.6–1.5 mm; pedicel 2–9 mm. Capsules 5–9 mm. Seeds often lobed, 1–2 times longer than wide; appendage usually 1, sometimes absent, to 2 times longer than seed; coat strongly inflated. 2n = 30.
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