Flora of North America species comparison

to 100 cm × 2 mm, scabrous.

obtusely or acutely angled, 10–50 cm, glabrous.

sheath fronts spotted red-brown or pale brown, apex truncate or short-convex, membranous or hyaline, rugose;

ligule retuse or rounded, to 2 mm, free limb to 0.2 mm;

blades 120 cm × 5 mm, longer than flowering stem.

basal sheaths brown;

sheaths of proximal leaves glabrous, fronts lacking spots and veins, apex U-shaped;

blades usually amphistomic, 2–4 mm wide, papillose or smooth.

spicate, (3–)7–10 cm × 15 mm, with 10–15 branches, the proximal branches distinctly separate; the proximal internode to 25 mm;

bracts setaceous, those subtending at least the proximal lateral branches conspicuous.

erect; staminate 1–2; pistillate 1–4;

proximal pistillate spike 1.6–2.4 cm × 4–7 mm, base cuneate or attenuate.

green to pale brown, veinless on both faces or 3-veined abaxially, body ovate or elliptic, 2–3.2 × 1.3–1.8 mm, base obtuse;

beak 0.8–1.2 mm, 1/3–1/2 length of perigynium.

ascending, pale brown, obscurely veined or with a few prominent veins on each face, somewhat inflated, loosely enclosing achenes, ovoid to ellipsoid, 2.7–3.5 × 1.6–2.4 mm, leathery, dull, base rounded, apex acute, glabrous;

beak widely conic and almost continuing body of perigynium, 0.1–0.2(–0.3) × 0.30–0.45 mm, entire.

red-brown, ovate, 1.2–1.4 × 1 mm, glossy.

entire or strongly constricted on 1 face, or irregularly constricted on margins, apex truncate to retuse, dull;

style base straight, sometimes bent.

pale brown, hyaline, awn to 3 mm.

bract equal to or longer than inflorescence, 1.5–3.5 mm wide.

scales dark purple-brown; 2–5.5 × 1.2–1.8 mm (including awn), narrower than perigynia, midvein reaching apex or not, 1/10–1/2 the width of scale, apex acute to acuminate, rarely aristate, awn glabrous or scabrous.

= 52.

= 80 (ne Russia).