Flora of North America species comparison

8–27 cm, scabrous distally;

bases (remnants of old leaves) strongly fibrous.

erect, 35–140 cm;

vegetative culms few, inconspicuous, usually fewer than 12 leaves, not strikingly 3-ranked, leaves clustered at apex.

blades green, greatly exceeding culms, 1.4–4 mm wide, herbaceous, papillose to scabrous abaxially, papillose to scabrous adaxially.

sheaths usually with white intervenal areas abaxially, conspicuously green-veined adaxially nearly to collar, Y-shaped hyaline area at collar, adaxially firm, summits truncate and prolonged to 2 mm beyond collar, rounded, proximal sheath loose, smooth;

distal ligules 2–5.5 mm;

blades 3–7 per fertile culm, 20–65 cm × 2.2–6(–6.5) mm.

with both staminate and pistillate spikes;

peduncles of staminate spikes 0.3–0.8 mm;

proximal cauline bracts leaflike, usually shorter than inflorescences.

erect to arching, compact to open, green, 1.5–5 cm × 5–16 mm;

proximal internode 3.5–10(–11.5) mm; 2d internode 2–8 mm;

proximal bracts scalelike with bristle tips shorter than or equaling inflorescences.

proximal pistillate spikes 2–3 (basal spikes 0);

cauline spikes overlapping, proximal 2 separated by less than 7 mm, with 6–15 perigynia; staminate spikes 5.3–10 × 1.1–2.3 mm.

4–10, overlapping to distinct, globose to ellipsoid, 7–13 × 4–7 mm, base rounded or occasionally tapered, apex obtuse to rounded.

pale green, veinless, ellipsoid, 2.8–3.6 × 1–1.3 mm, longer than wide;

beak straight, pale green, 0.7–1 mm, weakly ciliate-serrulate, apical teeth 0.1–0.4 mm.

15–80 on larger spikes, spreading, green distally, conspicuously 4+-veined on each face, narrowly to broadly ovate, plano-convex, 2.7–4.1 × 1.3–2.3 mm, 0.35–0.5 mm thick, margin flat, including wing 0.25–0.45 mm wide, smooth;

beak pale green at tip, flat, ciliate-serrulate, abaxial suture with conspicuous white-hyaline margin, distance from beak tip to achene 1.2–2.2 mm.

brown, ellipsoid, obtusely trigonous in cross section, 1.4–2 × 0.9–1.2 mm.

elliptic, 1.3–1.6 × 0.9–1.2 mm, 0.35–0.5 mm thick.

pistillate scales pale to, usually, dark reddish brown to purplish brown, with similarly colored or narrow white margins, ovate to lanceolate, 2.9–3.7 × 1.2–2 mm, equaling or exceeding perigynia, apex acute to acuminate or cuspidate; staminate scales ovate, 3–4.3 × 1–1.8 mm, apex obtuse to acute or acuminate.

1.4–2.6 mm.

3.

scales white-hyaline, with green midstripe, ovate, 2.1–3.3 mm, much shorter by 0.7–1.6 mm and narrower than perigynia, margins hyaline or pale, sometimes involute, apex obtuse to acute.

= 36.

= 68.