Flora of North America species comparison

20–90 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

6–34 cm, scabrous distally;

bases weakly or not fibrous.

sheaths white-hyaline or green-veined, sometimes papillose, summits U-shaped, not distally expanded;

distal ligules 2.2–6 mm;

blades 3–4 per fertile culm, 11–25 cm × 1.7–4.2 mm.

blades pale green or glaucous, equaling or usually exceeding stems, 1.8–3.8 mm wide, coriaceous, glabrous abaxially, glabrous or scabrous adaxially.

mostly dense, brown, 1.1–3 cm × 5–14 mm;

proximal internode 1–4 mm; 2d internode 1.4–3.4 mm;

proximal bracts scalelike, with bristle tips shorter than inflorescences.

with both staminate and pistillate spikes;

peduncles of basal spikes erect, short, stout;

peduncles of terminal staminate spikes 2–2.5 mm;

proximal nonbasal bracts leaflike, equaling or slightly exceeding inflorescences.

3–10, usually overlapping, ovoid to globose, 4–10 × 3–7 mm, base rounded or truncate, apex rounded.

proximal pistillate spikes 2–6 (basal spikes 1–4);

cauline spikes overlapping, with 1–4 perigynia;

terminal staminate spikes 5.8–12.7 × 1.5–2.2 mm.

ascending to ascending-spreading, light to dark reddish brown, conspicuously 3+-veined abaxially, faintly or basally 1–3-veined adaxially, winged to base, ovate or elliptic, plano-convex, 2.5–3.8 × (1–)1.2–2 mm, 0.35–0.45 mm thick, 1.9–2.5 times as long as wide, margin flat, including wing 0.2–0.5 mm wide, 1b ciliate-serrulate at least distally;

beak reddish brown at tip, flat, ± ciliate-serrulate, abaxial suture with reddish brown-hyaline margin, distance from beak tip to achene 1.2–2.2 mm.

green, often with reddish brown tinge, 12–15veined, conspicuous to at least mid body, ellipsoid, 4–5.3 × 1.4–2.2 mm;

beak often bent, occasionally straight, pale green, 0.8–1.9 mm, ciliate-serrulate, apical teeth 0.2–0.5 mm.

ovate or elliptic, 1–1.3 × 0.6–0.9 mm, 0.3–0.4 mm thick.

brown, ellipsoid, obtusely trigonous in cross section, 2.1–2.6 × 1.3–2.1 mm.

scales reddish brown, usually with green or whitish to brown midstripe, lanceolate, 2.5–3.5 mm, shorter and narrower than perigynia, apex acuminate or acute.

pistillate scales reddish brown, with similarly colored or narrow white margins, ovate, 3.6–6 × 1.2–2.2 mm, apex cuspidate to acuminate (awned on some basal spikes); staminate scales lanceolate, 3.7–5.9 × 1.4–2.2 mm, apex acute to acuminate.

2.3–3.3 mm.

3.

= 68, 70.