Flora of North America species comparison

15–38 cm.

10–110 cm.

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.

3–5 per culm;

sheaths tight, inner band hyaline, 3.5–24 cm, apex concave, glabrous;

ligules rounded to obtuse, 0.5–3.7 mm;

blades plicate, 8–60 cm × 0.4–4(–4.5) mm, widest leaf 0.8–4(–4.5) mm wide.

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.

0.8–5.5 cm;

spikes 2–8;

lateral spikes pistillate often with a few staminate flowers proximally, 3.1–13.1 mm, sessile, staminate portion 10-flowered, to 6.5 mm, pistillate portion 3–40-flowered, 2.5–12 mm;

basal 2 spikes 1.5–18 mm apart;

terminal spike gynecandrous, 4.8–23.7 mm, staminate portion 2–21-flowered, 1.8–13.5 × 0.8–1.3 mm, pistillate portion 4–38-flowered, 3–11 × 4.4–7.5 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-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.

spreading to reflexed, green, 6–13-veined abaxially, (0–)1–12-veined adaxially over achene, broadly ovate to suborbicular, cuneate or concavely tapered from widest point to beak, 1.9–3.8 × (1.3–)2.1–3 mm, 1.1–1.7(–1.9) times as long as wide;

beak 0.45–1.25 mm, 0.23–0.5(–0.63) length of body, serrulate, teeth 0.15–0.45 mm.

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

deltate to rhombic-orbiculate, 1–1.9 × 1–1.7 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.

scales ovate to ± suborbicular, 1.2–2.4 × 1.2–2 mm, apex obtuse to acute.

scales ovate-lanceolate to ovate, 1.3–3.5 × 0.8–1.4 mm, base clavate, apex acute to obtuse.

0.6–1.5(–1.8) mm.

= 64