Herb 7–23.5 cm high. Leaves linear or lanceolate, 0.9–3 cm long, 0.15–0.35 cm wide, 7–9-nerved. Peduncle 6–9 cm long, with c. 4 ribs. Sheath 17–45 mm long. Flower heads globular or cylindric, 3–5 mm long, 3.5–4.5 mm wide. Involucral bracts straw-yellow to hyaline, broadly obovate, 1.25–1.5 mm long, 0.9–1.5 mm wide, obtuse, glabrous, strongly reflexed at maturity. Floral bracts straw-yellow, lanceolate to spathulate, 1.6–2 mm long, 0.85–1.75 mm wide, acute, glabrous. Receptacle densely pilose, conical. Male flowers 1.2-1.5 mm long; sepals 3, fused but split on one side to form a spathe, hyaline or straw-yellow, 1–1.45 mm long, 0.55–0.8 mm wide, obtuse or truncate, glabrous; petals 3, hyaline, equal or dimorphic, triangular, acute or obtuse, pubescent with apical fringe of white hairs or glabrous; stamens 6; anthers black. Female flowers: sepals 2 or 3, straw-yellow, dimorphic, navicular, broad dorsal wing with dark window, c. 1 mm long, 0.8–1 mm wide, crested, pubescent with hyaline hairs inside at opening; median sepal linear, hyaline, 0.45–0.7 mm long, c. 0.05 mm wide, acute, glabrous; petals 3, hyaline, equal or dimorphic, linear, 1–1.1 mm long, 0.07–0.1 mm wide, acute, glabrous; ovary 3–locular. Seeds 0.3–0.35 mm long, c. 0.25 mm wide; epidermal cells with even wall thickenings.
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Leaves linear-lanceolate, 2--4(--8) cm, 2--4(--6) mm wide at middle, veins 7--11(--17). Scapes numerous, 16(--30) cm, 4-or 5-ribbed; sheath 2.5--5 cm; receptacle hairs sparse, ca. 1.2 mm; heads brownish, globose to subglobose, 2.5--6 × 4--6 mm; involucral bracts reflexed, straw-colored, obovate to narrowly so, 2.2--2.5 × 1.4--1.6 mm, rigid, membranous, glabrous; floral bracts obovate, occasionally crested along midvein, glabrous or abaxially with some short hairs. Male flowers: sepals spathelike, 1.7--1.9 mm, usually glabrous, apex 3-lobed, lobes truncate or irregularly dentate at apex; petals 3, ovate, anterior one slightly larger than others, usually glabrous, gland absent; anthers black. Female flowers: sepals 3, free, posterior one 0.3--1 mm, deciduous, lateral ones boatlike, 1.8--2 mm, adaxially villous, abaxially broadly winged; petals 3, linear to linear-oblanceolate, anterior one larger than others, membranous, glabrous or sparsely hairy, gland absent; ovary 3-loculed; style 3-cleft. Seeds ovoid, ca. 0.4 mm in diam.; testa broadly and hexagonally reticulate, prickles not visible. Fl. and fr. after Sep.
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