Flora of North America species comparison

straight or arcuate, 2–85 cm.

hollow, ± spongy near base, trigonous in cross section, 35–125 cm;

vegetative culms hollow, flattened when pressed, taller than fertile culms.

of flowering stems shorter than to exceeding culms, to 20 cm × 0.8–5.4 mm;

ligules on distal cauline leaves usually obsolete (except in 414.b Carex viridula subsp. brachyrrhyncha).

basal sheaths reddish purple, inner bands fibrillose with age;

sheaths with apex of inner band pale brown to dull reddish purple, pubescent or scabrous, at least apically, rarely glabrous;

ligules (6–)11–45 mm;

blades 3–10 mm wide, usually sparsely to moderately long-pubescent, finely papillose abaxially, glabrous adaxially.

peduncles of terminal staminate spikes 0–28 mm;

bracts to 18 cm × 0.6–3.4 mm;

inner band of sheaths concave or truncate.

12–60 cm;

spikes erect or ascending;

proximal 2–5 spikes pistillate;

terminal (1–)2–6 spikes staminate.

proximal pistillate spikes 1–8, contiguous or proximal distant, sessile or short-pedunculate, globose to short-cylindric, 4–17.5 × 3–11 mm;

terminal staminate spike sessile or pedunculate, 5–25 × 1–3.6 mm.

spreading, yellow to dark olive, 1.8–4.2 × 0.8–2 mm, apex gradually or abruptly narrowed;

beak straight or reflexed less than 20°, 0.3–2.1 mm, scabrous or smooth.

12–21-veined, (6.5–)7–12 × 1.8–3.8 mm, glabrous;

beak 2.1–4 mm, glabrous (rarely few spreading hairs on main veins), teeth spreading to outcurved, (1.2–)1.5–3 mm.

1–1.8 × 0.7–1.4 mm.

pistillate scales pale brown to reddish brown, 1.4–3.2 × 0.8–1.7 mm, margins pale, narrow, hyaline; staminate scales reddish brown, lanceolate to ovate, 2.3–5.2 × 0.7–2 mm, margins narrowly pale hyaline, apex obtuse to acuminate.

0.9–3.1 mm.

scales lanceolate to narrowly ovate, apex acute, conspicuously scabrous-awned, glabrous or scabrous near midrib.

scales lanceolate to narrowly ovate, apex obtuse to acuminate, scabrous-awned, glabrous or, rarely, sparsely pubescent.