Flora of North America species comparison

dark maroon at base; flowering stems 25–80 cm, usually longer than leaves at maturity, 1–2 mm thick, glabous to pubescent.

35–110 cm;

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

basal sheaths maroon, bladeless, pubescent, sometimes glabrous, others grading from maroon to green on back, light brown-hyaline on front, dotted or streaked with dark red, pubescent distally;

blades flat, 3–7 mm wide, pilose, especially abaxially, sparsely so distally, margins ciliate.

sheaths adaxially green, narrow hyaline band near collar, adaxially firm, summits U-shaped, smooth;

distal ligules 1.5–3.2 mm;

blades 3–6 per fertile culm, 12–38 cm × 1.5–4 mm.

peduncles of lateral spikes slender, 5–20 mm, shorter than spikes, pubescent;

peduncle of terminal spikes 5–40 mm, minutely scabrous;

proximal bracts nearly equaling but usually not exceeding inflorescences;

sheaths 15–25 mm;

blades 1.5–3 mm wide.

erect, ± congested, green to light brown, 1.3–3(–3.5) cm × 7–16 mm;

proximal internode 1.5–6 mm; 2d internode 2.5–6.5 mm;

proximal bracts aristate, with bristle tips shorter than inflorescences.

2–4(–5), overlapping, globose to ellipsoid, 6–16 × 5–12 mm, base and apex rounded;

terminal spike usually lacking conspicuous staminate base.

green to dark olive-green, copiously red dotted, 2-ribbed with 6–10 almost equally prominent veins, loosely enveloping achenes, ellipsoid-ovoid, 3.5–5 × 1.7–2 mm, membranous, base acute or with short stipe, apex gradually tapered to beak, glabrous or less often pubescent;

beak minutely bidentate, 0.4–0.7 mm.

(25–)30–80 per spike, spreading at maturity, ascending-spreading, pale brown, conspicuously 5-veined or more abaxially, conspicuously 0–6-veined adaxially, elliptic to ± orbiculate, plano-convex, (3–)3.3–4.8(–5.7) × 1.8–3 mm, 0.5–0.6 mm thick, 1.2–1.8 times as long as wide, margin flat, including wing 0.4–0.8 mm wide, smooth;

beak light 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 1.6–2.6 mm.

distinctly stipitate, 1.7–2.5 × 1–1.5 mm, stipe to 0.7 mm.

elliptic to narrowly oblong, 1.3–1.7 × 0.9–1.3 mm, 0.5–0.6 mm thick.

spikes 2–4, 1 per node, distal 2 usually overlapping terminal spike, others well separated, nodding or drooping at maturity, pistillate with 20–45 perigynia attached 1.5 mm apart, narrowly cylindric, 15–45 × 3–4.5 mm.

spike gynecandrous, 15–45 × 2–4.5 mm.

scales hyaline with broad green, red dotted midrib, elliptic-ovate, shorter than mature perigynia, apex acute to aristate or awned, awn less than 1 mm, ciliate.

scales hyaline-brown, with green or pale midstripe, ovate, 2.9–3.5 mm, much shorter and narrower than perigynia, margins pale, apex acute.

= 68, 70.