Flora of North America species comparison

solitary or not, erect, 50–130 cm.

15–38 cm.

4–7;

basal sheaths brownish;

sheath of distal leaf 3–21 cm;

ligules rounded to triangular, 6–28 mm;

blades 30–80 cm × 6–13 mm.

sheath summits white-hyaline, green ribbed, U-shaped, occasionally prolonged to 4 mm distal to collar;

distal ligules 1–3(–3.5) mm;

blades 2–4 per fertile culm, 4.5–18 cm × 1.5–2.5 mm.

6–40 cm;

peduncles of proximal spikes 1–13 cm, basal 2 peduncles 2–17 cm apart; of terminal spikes 1–12 cm, shorter than to somewhat exceeding the distal pistillate spike;

bracts leafy, sheath 1–9 cm;

blades 20–70 cm × 4–11 mm.

nodding, dense, dark or medium brown, 1–1.2 cm × 5.5–10 mm;

proximal internode 1.3–3 mm; 2d internode 0.6–1.5 mm;

proximal bracts scalelike to bristlelike.

proximal pistillate spikes 2–6, the distal usually ± crowded, ascending, densely 8–90-flowered, usually cylindric, 2–8 × 1.5–3 cm;

terminal staminate spikes 1–2, 2–10 cm × 2–5 mm.

3–6, usually individually indistinct, ovoid to broadly ovoid, 4.5–6.5 × 2.5–5.5 mm, base and apex acute to rounded;

terminal spike without conspicuous staminate base.

ascending to spreading, strongly 17–25-veined, sessile, lance-ovoid, 12–18.5 × 3.8–6 mm, shiny, glabrous;

beak conic, 6–9 mm.

ascending-spreading to spreading, gold to dark brown, conspicuously 0–7-veined abaxially, conspicuously 0–4-veined adaxially, ovate, plano-convex, 2.6–3.2 × 0.9–1.3 mm, 0.5–0.65 mm thick, margin unwinged, pithlike tissue usually present in proximal perigynia walls;

beak medium or dark brown at tip, often with white-hyaline, cylindric to somewhat flat, abaxial suture with conspicuous white margin, distance from beak tip to achene 1.2–1.6 mm, entire.

stipitate, rhombic, concave faces, angles thickened, prominently knobbed with hard, nipplelike points, 3–4.5 × (2.2–)2.4–3.4 mm;

style same texture as achene.

ovate to obovate, 1.2–1.5 × 0.8–1 mm, 0.4–0.5 mm thick.

scales 3–9 veined, lanceolate, 6–13 × 1.8–3.2 mm, apex acute to awned, awn rough, to 5.5 mm.

scales dark brown, usually with pale or green midstripe, ovate, 1.5–2.5(–3.5) mm, usually shorter, narrower than perigynia, margin occasionally hyaline gold, to 0.4 mm wide, apex obtuse or acute.

3, 3.5–7 mm.

= 64