Aerial stems usually leafy only near bases, openly branched. Leaves: petioles winged; blades 3–nerved, 3–25 cm. Phyllaries 5–6(–10), 1–2 mm. Peripheral florets: corollas soon falling, 0.5–1.2 mm. Inner florets: corollas tardily falling, 1–2.3 mm. Cypselae 5–9 mm. 2n = 46.