Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

erect, strict, stoutish (2.5–4 mm at base), (15–)20–50 cm.

sheaths white-hyaline or green-veined, sometimes papillose, summits U-shaped, not distally expanded;

distal ligules 2.2–6 mm;

blades 3–4 per fertile culm, 11–25 cm × 1.7–4.2 mm.

sheaths pale brown abaxially, inner band hyaline, concave at summit;

ligules slightly longer than wide, acutish;

blades pale gray-green to bluish green, flat, 10–30 cm × 2–4 mm, subequal to shorter than culms.

mostly dense, brown, 1.1–3 cm × 5–14 mm;

proximal internode 1–4 mm; 2d internode 1.4–3.4 mm;

proximal bracts scalelike, with bristle tips shorter than inflorescences.

1.5–3(–4) cm × 8–14 mm;

proximal bracts shorter than to exceeding spikes;

distal bracts scalelike.

3–10, usually overlapping, ovoid to globose, 4–10 × 3–7 mm, base rounded or truncate, apex rounded.

3–6, gynecandrous, closely approximate, proximal spikes only slightly separate, containing 15–30 perigynia, ovoid to short-oblong, 6–10 × 4–6 mm;

terminal spike staminate for less than 1/2 of length, not or scarcely clavate.

ascending to ascending-spreading, light to dark reddish brown, conspicuously 3+-veined abaxially, faintly or basally 1–3-veined adaxially, winged to base, ovate or elliptic, plano-convex, 2.5–3.8 × (1–)1.2–2 mm, 0.35–0.45 mm thick, 1.9–2.5 times as long as wide, margin flat, including wing 0.2–0.5 mm wide, 1b ciliate-serrulate at least distally;

beak reddish brown at tip, flat, ± ciliate-serrulate, abaxial suture with reddish brown-hyaline margin, distance from beak tip to achene 1.2–2.2 mm.

appressed-ascending, gray-green, sometimes dark brown in age, obscurely many-veined faces, ovate-elliptic, 2.5–3 × 1.5 mm, widest near middle, membranous;

beak nearly entire or few marginal teeth.

ovate or elliptic, 1–1.3 × 0.6–0.9 mm, 0.3–0.4 mm thick.

yellow-brown, oblong-obovate, 1.5 × 1–1.25 mm, dull to slightly glossy.

scales reddish brown, usually with green or whitish to brown midstripe, lanceolate, 2.5–3.5 mm, shorter and narrower than perigynia, apex acuminate or acute.

scales dull green-white, often red-brown tinged, midvein green, margins white-hyaline, ovate, subequal to somewhat concealing perigynia, apex cuspidate to acute.

= 68, 70.

= 56.