Flora of North America species comparison

erect or ascending, 7–52 cm × 0.5–1 mm.

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

basal sheaths white or light brown;

nonbasal sheaths green, 8–37 mm;

blades green, 8–44 cm × 0.8–5 mm, shorter than or overtopping culm, 0.5–1.3(–1.8) times as tall as tallest flowering culm;

blades of vegetative shoots 1–3.5 times wider than bract blades.

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.

2.2–11.4 cm × 1–3 mm.

spikes (2–)4 per culm, scattered;

peduncles of pistillate spikes 0.5–10.2 cm; of staminate spike 0.4–8.7 cm.

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.

3–9 per spike, finely veined, obovoid, 2–4.2 × 1.2–1.8 mm;

beak tapering.

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.

slender, ascending through entire orifice.

obovoid, 1.8–2.8 × 1–1.6 mm, sides plane or slightly concave at maturity, tightly fitting perigynia.

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

spikes: proximal usually basal, erect, ascending, or drooping, short to long pedunclulate, 6–18 × 4–5 mm.; pistillate scales keeled, 1.8–2 × 1–1.2 mm, midribs green, margins hyaline, apex acute, proximal scales of lateral spikes subtending perigyinia.

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.

spike 1, linear to linear-clavate, 11–24 × (1–)1.2–2.7 mm.; staminate scales oblong, 2–3.6(–5.5) × 1–1.5 mm, midribs green, margins hyaline, frequently brown tinged, apex acute.

2–3.3 mm.

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.