Flora of North America species comparison

25–120 cm;

vegetative culms few, inconspicuous, usually fewer than 15 leaves, not strikingly 3-ranked.

erect, not stiff, 15–90 cm.

sheaths adaxially white-hyaline, summits U-shaped or truncate and reaching to 1.5 mm beyond collar, smooth;

distal ligules 1.5–2.8 mm;

blades 3–5 per fertile culm, 9–35 cm × 1.7–3.8 mm.

sheaths pale brown abaxially, inner band thin, hyaline, sometimes slightly red tinged, concave at summit;

ligules slightly longer than wide;

blades pale green to gray-green flat, 10–20(–30) cm × (1.5–)2–4 mm, subequal to shorter than culms, not stiff.

congested or somewhat open, green to brown, 1.4–2.7(–3.4) cm × 7–16 mm;

proximal internode 3–9 mm; 2d internode 3–8 mm;

proximal bracts scalelike, bristle tips shorter than inflorescences.

2–15 cm × 5–10 mm;

proximal bracts shorter than to exceeding spikes;

distal bracts usually scalelike.

2–5, distant, distinct, globose to ovoid, 10–35-flowered, 7–12 × 5–10 mm, base rounded or tapered, apex rounded;

terminal spike usually lacking conspicuous staminate base.

4–8, gynecandrous, proximal ± remote, distal spikes approximate, sometimes flexuous, containing (5–)10–20(–30) perigynia suborbicular to oblong, 3–12 × 3–5 mm;

terminal spike staminate for less than 1/2 of length, often clavate due to more conspicuous staminate part.

(10–)15–40(–45) per spike, ascending, light greenish brown to brown with pale margin, conspicuously 6-veined or more abaxially, 4–6-veined adaxially, broadly ovate to orbiculate, plano-convex, 4–5.4 × 2.4–3.4 mm, 0.5–0.6 mm thick, margin flat, including wing 0.3–0.8 mm wide, smooth;

beak pale green or brown at tip, flat, 0.7–1.6(–1.8) mm, ciliate-serrulate, abaxial suture with white or hyaline golden brown margin, distance from beak tip to achene 1.7–2.6(–2.9) mm.

appressed-ascending, gray-green, becoming yellowish brown, obscurely many-veined, elliptic-ovate, 1.8–3 × 1.2–1.7 mm, widest near middle, membranous;

beak abaxial suture inconspicuous, small marginal teeth.

broadly ovate to orbiculate, 1.6–2 × 1.4–1.8 mm, 0.5–0.6 mm thick.

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

scales yellowish brown, lance-ovate, 2.9–4 mm, 0.7–1.7 mm shorter than perigynium or reaching base or sometimes middle of perignyium beak, margins pale, apex acute or obtuse.

scales hyaline with green, 3-veined center when young, usually brownish tinged in age, broadly ovate, subequal to, not concealing perigynia, apex obtuse to acutish.

= 74.

= 56.