Flora of North America species comparison

30–140 cm.

10–40 cm, smooth.

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

distal ligules 2.8–8 mm;

blades 3–7 per fertile culm, 11–50 cm × 2.5–6 mm.

3–4 mm wide.

dense or open, pale green or brown, 2–6.5 cm × 7–20 mm;

proximal internode 3–13 mm; 2d internode 4–10 mm;

proximal bracts scalelike with bristle tips shorter than inflorescences.

proximal bracts shorter than, sometimes equaling or, occasionally, exceeding inflorescences;

spikes overlapping, contiguous, forming a dense terminal cluster or, sometimes, proximal spikes separate and distinct, sessile, short-oblong, 7–10 × 5–7 mm;

lateral 2–3 spikes pistillate;

terminal spike gynecandrous.

3–11, distant, distinct, ellipsoid to ovoid, 6–20 × 4–9 mm, base rounded or short-acute, apex broadly acute to obtuse.

± spreading, light or golden brown, faintly 3–8-veined on each face, obovate, flat except over achene, 4–5.5 × 2.5–3.8 mm, 0.4–0.5 mm thick, margin flat, including wing 0.8–1.5 mm wide;

beak light brown at tip, flat, 0.85–2.2 mm, ciliate-serrulate, abaxial suture with light brown margin, distance from beak tip to achene 1.8–3 mm.

ascending, glossy reddish brown, often with yellowish or greenish brown margins, veinless, obovate or circular, 3.5–4.5 × 2.5–3 mm, apex abruptly beaked, smooth;

beak 0.5–0.8 mm, deeply bidentate, smooth.

oblong, 1.7–2 × 0.9–1.1 mm, 0.3–0.4 mm thick.

filling proximal 1/2 or less of perigynia.

scales white-hyaline or tan, with green midstripe extending to tip, lanceolate, 2.8–3.5(–3.8) mm, shorter or longer and much narrower than perigynia, apex firm, acuminate or awned to 0.8 mm.

scales dark brown or black to margins, lanceolate, shorter or longer than, and narrower than, perigynia, midvein same color as body, inconspicuous, apex usually acute, occasionally short-mucronate.

= 74.