Plants 0.4-2.5(-4) × 0.2-8 dm. Leaf blades 1-8 × 0.1-1.5 cm. Inflorescences 0.3-3 × 2.8 dm; branches (2-)4-10 at first node, 1-2(-3) thereafter; bracts 1-5 × 0.5-2 mm. Peduncles 0.1-3 mm or absent. Involucral bracts (1.5-)2-4 × 0.5-2 mm. Flowers: perianth 0.5-1.5 mm; filaments 0.5-1 mm; anthers 0.2 mm. Achenes 1 mm.