Flora of North America species comparison

erect, not stiff, 15–90 cm.

hollow, ± spongy near base, trigonous in cross section, 35–125 cm;

vegetative culms hollow, flattened when pressed, taller than fertile culms.

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.

basal sheaths reddish purple, inner bands fibrillose with age;

sheaths with apex of inner band pale brown to dull reddish purple, pubescent or scabrous, at least apically, rarely glabrous;

ligules (6–)11–45 mm;

blades 3–10 mm wide, usually sparsely to moderately long-pubescent, finely papillose abaxially, glabrous adaxially.

2–15 cm × 5–10 mm;

proximal bracts shorter than to exceeding spikes;

distal bracts usually scalelike.

12–60 cm;

spikes erect or ascending;

proximal 2–5 spikes pistillate;

terminal (1–)2–6 spikes staminate.

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.

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.

12–21-veined, (6.5–)7–12 × 1.8–3.8 mm, glabrous;

beak 2.1–4 mm, glabrous (rarely few spreading hairs on main veins), teeth spreading to outcurved, (1.2–)1.5–3 mm.

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

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.

scales lanceolate to narrowly ovate, apex acute, conspicuously scabrous-awned, glabrous or scabrous near midrib.

scales lanceolate to narrowly ovate, apex obtuse to acuminate, scabrous-awned, glabrous or, rarely, sparsely pubescent.

= 56.