Flora of North America species comparison

to 100 cm × 2 mm, scabrous.

acutely angled, 20–90 cm, scabrous.

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 amphistomic, 3–12 mm wide, glabrous.

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.

proximal bract subequal to inflorescence, 3–7.5 mm wide.

erect; staminate 1–3; pistillate 2–4;

proximal pistillate spike 3–5.5 cm × 5–8 mm, base cuneate.

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.

divergent, brown with red-brown spots on apical 1/2, 5–9-veined on each face, somewhat inflated, loosely enclosing achenes, ellipsoid or obovoid, 2.6–4 × 1.6–2.5 mm, leathery, dull, apex rounded or obtuse, glabrous;

beak brown, 0.3–0.6 mm, leathery, bidentate, teeth to 0.5 mm.

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

not constricted, dull.

pale brown, hyaline, awn to 3 mm.

scales red-brown, longer than perigynia, apex acute, awned, awn to 0.5 mm.

= 52.

= 66, 68.