Flora of North America species comparison

straight or arcuate, 2–85 cm.

8–38 cm;

bases (remnants of old leaves) weakly to strongly fibrous.

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).

blades green, 1.5–3.5(–5) mm wide, herbaceous, smooth to scabrous abaxially, smooth to scabrous 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.

usually with either staminate or pistillate spikes, occasionally with both;

peduncles of staminate spikes short;

proximal nonbasal bracts leaflike, dark purple to black at base, shorter than inflorescences.

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.

proximal pistillate spikes 1–4 (basal spikes 0–1);

cauline spikes overlapping or somewhat separted, with 4–9 perigynia; staminate spikes 13–24 × (1.4–)2–4.1 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.

green, occasionally dark purple in age, veinless or 5-veined near base, obovoid, 3.1–3.6 × 1.5–1.8 mm;

beak slightly bent, dark purple, 0.5–1 mm, weakly ciliate-serrulate, apical teeth 0.2 mm.

1–1.8 × 0.7–1.4 mm.

pale to medium brown, globose, round in cross section, 1.9–2.2 × 1.4–1.8 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.

pistillate scales dark purple to black, with narrow white margins, lanceolate, 3.8–4.6 × 1.3–1.8 mm, apex acuminate; staminate scales oblanceolate, 4.6–5.6 × 1.1–1.6 mm, apex acute;

proximal staminate scales with narrow white margins 0.1–0.2 mm wide.

0.9–3.1 mm.

2.1–4 mm.

3.