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.

uniformly slender, 40–80 cm;

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

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 conspicuously green-veined nearly to collar, narrow hyaline band or sharp Y-shaped region at collar, adaxially firm, summits U-shaped;

distal ligules 1.6–3.3 mm;

blades 2–5 per fertile culm, 12–18 cm × 1.5–2.5 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.

stiffly erect, dense to slightly open, brown, 1.5–3(–3.5) cm × 6–14 mm;

proximal internode 2–12 mm; 2d internode 2–7 mm;

proximal bracts scalelike, often with bristletips shorter than or equaling inflorescences.

2–5, distant, distinct, ovoid, 7–12 × 4–7 mm, base rounded or short-acute, apex acute.

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.

15–80 in larger spikes, appressed, usually golden brown, conspicuously 6–9-veined abaxially, inconspicuously veined adaxially, diamond shaped, flat except over achene, 4–5 × 2–2.8 mm, 0.4–0.5 mm thick, base subacute or acute, margin flat, including wing 0.6–0.9 mm wide, smooth;

beak apprressed, golden brown at tip, flat, 0.7–1.6(–1.8) mm, 2/5+ length of body, ciliate-serrulate, abaxial suture with hyaline, golden brown margin, distance from beak tip to achene 2–3 mm.

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

elliptic to ovate, 1.5–1.7 × 0.8–1.1 mm, 0.3–0.4 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 reddish brown, 1-veined midstripe sometimes pale, broadly lanceolate, 2.7–3.6 mm, shorter and narrower than perigynia, apex firm, acute to acuminate.

= 72.