Flora of North America species comparison

lateral, erect or ascending, usually overtopping vegetative shoots, 24–54 cm × 0.7–1 mm.

easily compressed, to 120 cm × 7 mm, scabrous.

basal sheaths purple, 7–18 mm;

blades erect or ascending, evergreen, midrib and 2 lateral veins strongly developed, 14–42 cm × 8–32 mm, older leaves often shriveling or dead at tips.

sheaths usually all with blades, green;

fronts rugose, indistinctly linearly veined, apex colorless, fragile, convex, not forming extension, erose;

ligules acute, 10 mm, free limb to 0.8 mm;

blades not epistomic, to 100 cm × 15 mm.

spikes 3–5 per culm, scattered;

peduncle of pistillate spikes erect or spreading, rarely drooping, exserted 0–18 mm;

bracts from middle and proximal portions of culms reduced, 0.8–2 cm × 2–3.5 mm.

densely spicate, elongate, cylindric, with 15–25 distinguishable branches, 5–15 × 4 cm;

proximal internode to 10 mm.

(4–)9–13(–15) per spike, overlapping, finely veined, elliptic, 3.7–4.9 × 1.6–2 mm;

beak constricted.

pale brown with red-brown veins, 15-veined abaxially, 7-veined adaxially, to 6 × 2 mm, base distended proximally, cordate;

stipe to 0.4 mm;

beak to 3.5 mm, serrulate.

ascending from achene through entire orifice.

ovoid, 2.2–2.7 × 1.5–1.9 mm, sides flat to slightly concave at maturity, tightly fitting in perigynia.

ovate, to 2 × 1.5 mm;

stalk to 0.3 mm;

persistent style base cylindric.

spikes the proximal basal, 8–30 × 4–7 mm.; pistillate scales slightly keeled, 3.2–4.2 × 1.8–2.2 mm, midribs green, margins hyaline with purple outward, apex cuspidate to acuminate to acute.

spike 1, pedunculate, oblanceolate to linear, 8–20 × 2–3.5 mm.; staminate scales 3–6 × 1.5–2 mm, midveins green or purple, margins dark purple, apex obtuse.

3.2–4.2 mm.

hyaline.

= 50, 52.