Flora of North America species comparison

30–120(–140) cm;

vegetative culms with few leaves clustered at apex.

23–56 cm.

sheaths adaxially conspicuously green-veined nearly to collar, with a narrow hyaline band or sharp Y-shaped hyaline region at collar; adaxially firm, summits U-shaped, finely papillose;

distal ligules 1.8–4.4(–6) mm;

blades 2–4(–6) per fertile culm, 8–30 cm × 2–4.5 mm.

sheath adaxially white-hyaline, summits U-shaped to rounded, often prolonged to 6 mm beyond collar;

distal ligules 0.8–2.5(–4) mm;

blades (2–)3–4 per fertile culm, 6–30 cm × 1.7–3.6 mm.

± erect, usually open, green to brown, 1–4.5(–6) cm × 5–14 mm;

proximal internode 1–14 mm; 2d internode 3–8 mm;

proximal bracts scalelike, often with bristle tips.

dense or open, green and brown, gold, or brown, 1.4–3 cm × (5–)8–15 mm, stiff, appearing coarse-textured;

proximal internode 3–7 mm; 2d internode 1–4 mm;

proximal bracts usually aristate, shorter than inflorescences.

3–10, distinct, ellipsoid to ovoid, 6–13(–17) × 3.8–7 mm, base rounded or obtuse, apex obtuse to broadly acute; staminate portion 2 mm or less.

3–7, distant to loosely aggregated, usually individually distinct, narrowly to broadly ovoid, 7–10 × (3–)4.5–7.5 mm, base rounded or attenuate, apex usually acute.

appressed-ascending, green to drab brown, conspicuously 5–many-veined on each face, obovate, flat except over achene, 3–4.6 × 1.6–2.6(–2.8) mm, 0.4–0.5 mm thick, margin flat, including wing 0.5–0.8 mm wide;

beak green to brown at tip, flat, broadly triangular, ciliate-serrulate, abaxial suture with conspicuous white hyaline margin, distance from beak tip to achene 1.4–2.2 mm.

appressed-ascending to ascending-spreading, green or gold, usually green toward beak, contrasting in color with pistillate scales, conspicuously 0–7-veined abaxially, conspicuously 0(–5)-veined adaxially, thin, ovate to broadly ovate, plano-convex or, more often, biconvex, (3.3–)3.5–4.3 × (1.3–)1.5–2 mm, 0.5–0.6(–0.8) mm thick, 2.1–2.7 times as long as wide, margin flat, including wing 0.2–0.4 mm wide, ciliate-serrulate at least on distal body, without metallic sheen;

beak gold, gold-brown, red-brown, or brown at tip, flat, ± ciliate-serrulate or cylindric, unwinged, ± entire for 0.6 mm, abaxial suture usually inconspicuous, distance from beak tip to achene 1–2.4 mm.

oblong, 1.3–1.7 × 0.7–1 mm, 0.4–0.5 mm thick, apiculum less than 0.4 mm;

style straight.

broadly oblong, ovate, broadly elliptic, or quadrate, 1.5–2 × 1–1.5 mm, 0.4–0.7 mm thick.

scales white-hyaline, becoming pale silvery brown with age, with pale or green center, broadly lanceolate, 2.2–3.7 mm, shorter and narrower than perigynia, apex obtuse.

scales white, gold, red-brown, or chestnut-brown, usually with pale to green midstripe, ovate to broadly ovate, 2.8–3.7 mm, shorter or longer and narrower than perigynia, margin occasionally white, 0.1–0.2(–0.5) mm wide, apex usually acute to acuminate.

= 58, 62.

= 80.