Flora of North America species comparison

30–120(–140) cm;

vegetative culms with few leaves clustered at apex.

5–35 cm.

sheaths adaxially conspicuously green-veined nearly to collar, with a narrow hyaline band or sharp Y-shaped hyaline region at collar; adaxially firm, summits U-shaped, finely papillose;

distal ligules 1.8–4.4(–6) mm;

blades 2–4(–6) per fertile culm, 8–30 cm × 2–4.5 mm.

basal;

proximal leaves with blades 5–6 mm wide.

± erect, usually open, green to brown, 1–4.5(–6) cm × 5–14 mm;

proximal internode 1–14 mm; 2d internode 3–8 mm;

proximal bracts scalelike, often with bristle tips.

spikes approximate, oblong to elongate, 8–25 × 3–8 mm;

proximal spike separate, sometimes pendent and long-pedunculate;

lateral spikes 2–4;

distal spikes erect, short-pedunculate.

3–10, distinct, ellipsoid to ovoid, 6–13(–17) × 3.8–7 mm, base rounded or obtuse, apex obtuse to broadly acute; staminate portion 2 mm or less.

appressed-ascending, green to drab brown, conspicuously 5–many-veined on each face, obovate, flat except over achene, 3–4.6 × 1.6–2.6(–2.8) mm, 0.4–0.5 mm thick, margin flat, including wing 0.5–0.8 mm wide;

beak green to brown at tip, flat, broadly triangular, ciliate-serrulate, abaxial suture with conspicuous white hyaline margin, distance from beak tip to achene 1.4–2.2 mm.

veinless, ovate, 3-5–4 × 1.5–2 mm, papillose;

beak 0.3–0.5 mm, shallowly bidentate or truncate, sparsely papillose or smooth.

oblong, 1.3–1.7 × 0.7–1 mm, 0.4–0.5 mm thick, apiculum less than 0.4 mm;

style straight.

scales white-hyaline, becoming pale silvery brown with age, with pale or green center, broadly lanceolate, 2.2–3.7 mm, shorter and narrower than perigynia, apex obtuse.

scales dark brown to black, ovate or lanceolate, equaling and as wide as perigynia, apex acute or mucronate.

= 58, 62.