Flora of North America species comparison

erect, not stiff, 15–90 cm.

reddish brown to dark maroon at base; flowering stems 30–60 cm, much longer than leaves at maturity, 1–1.3 mm thick, sparingly pubescent.

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 brown, bladeless, sparingly pubescent;

others grading from maroon to green on back, brown-hyaline, often red dotted and pubescent on front, especially near apex;

blades flat, 2.7–12 mm wide, usually pilose, more densely so adaxially, margins long-ciliate, except in rare glabrous form.

2–15 cm × 5–10 mm;

proximal bracts shorter than to exceeding spikes;

distal bracts usually scalelike.

peduncles of lateral spikes 40–100 mm (proximal spikes) or less than 10 mm (distal spikes), pilose;

peduncles of terminal spike to 25 mm, pilose or rarely glabrous;

proximal bracts equaling inflorescence or more often shorter;

sheaths 5–87 mm;

blades 1–3 mm wide.

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.

golden green, sometimes red dotted, 2-ribbed and finely 8–10-veined, substipitate, loosely enveloping achene, ellipsoid, 2.5–4.2 × 1–1.8 mm, membranous, apex tapering to beak, entire surface pubescent, often densely so, except in rare glabrous form;

beak minutely bidentate, 0.8–1.4 mm, ciliate between apical teeth.

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

sessile, 2–3.1 × 1–1.7 mm.

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 white-hyaline at base and along margins, suffused with reddish brown near apex, with broad green midrib, broadly ovate, nearly as long as perigynia, apex truncate or rounded with ciliate green awn 1 mm, otherwise glabrous.

spikes 2–4, 1 per node, well separated (proximal spikes) or crowded and overlapping staminate spike (distal spikes), erect, pistillate with 20–35 perigynia attached 1–1.5 mm apart, cylindric, 5–30 × 2–7 mm.

spike staminate, rarely gynecandrous, sessile or more commonly pedunculate, 10–27 × 2.2–6 mm.

= 56.

= 70, 72.