Flora of North America species comparison

15–38 cm.

25–120 cm;

vegetative culms few, inconspicuous, usually fewer than 15 leaves, not strikingly 3-ranked.

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.

sheaths adaxially white-hyaline, summits U-shaped or truncate and reaching to 1.5 mm beyond collar, smooth;

distal ligules 1.5–2.8 mm;

blades 3–5 per fertile culm, 9–35 cm × 1.7–3.8 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.

congested or somewhat open, green to brown, 1.4–2.7(–3.4) cm × 7–16 mm;

proximal internode 3–9 mm; 2d internode 3–8 mm;

proximal bracts scalelike, bristle tips shorter than inflorescences.

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.

2–5, distant, distinct, globose to ovoid, 10–35-flowered, 7–12 × 5–10 mm, base rounded or tapered, apex rounded;

terminal spike usually lacking 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.

(10–)15–40(–45) per spike, ascending, light greenish brown to brown with pale margin, conspicuously 6-veined or more abaxially, 4–6-veined adaxially, broadly ovate to orbiculate, plano-convex, 4–5.4 × 2.4–3.4 mm, 0.5–0.6 mm thick, margin flat, including wing 0.3–0.8 mm wide, smooth;

beak pale green or brown at tip, flat, 0.7–1.6(–1.8) mm, ciliate-serrulate, abaxial suture with white or hyaline golden brown margin, distance from beak tip to achene 1.7–2.6(–2.9) mm.

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

broadly ovate to orbiculate, 1.6–2 × 1.4–1.8 mm, 0.5–0.6 mm thick.

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 yellowish brown, lance-ovate, 2.9–4 mm, 0.7–1.7 mm shorter than perigynium or reaching base or sometimes middle of perignyium beak, margins pale, apex acute or obtuse.

= 64

= 74.