Flora of North America species comparison

25–80 cm;

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

30–85 cm.

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

distal ligules 2.4–5.6 mm;

blades 2–5 per fertile culm, 10–25 cm × 2–5 mm.

sheaths adaxially white-hyaline, summits U-shaped, prolonged more than 2.8 mm;

distal ligules 2–5 mm;

blades (2–)3–4 per fertile culm, 10–30(–40) cm × 2–4(–5) mm.

dense to open, green or brown, 1.5–4 cm × 10–20 mm;

proximal internode 2–12 mm; 2d internode 3–10 mm;

proximal bracts scalelike, with bristle tips shorter than inflorescences.

open, stiffly erect, green, gold, or pale brown, (2–)2.5–4.5(–6) cm × 9–16 mm;

proximal internode 4.5–9 mm; 2d internode (2–)5–9(–11) mm;

proximal bracts scalelike, awn shorter than inflorescences.

3–6, distant, distinct, ellipsoid to ovoid-globose, 8–20 × 6–10 mm, base rounded or short-acute, apex broadly obtuse to rounded.

(3–)4–7, distant, distinct, fusiform, ovoid, or obovoid, 15–27 × 5.5–9 mm, base tapered to attenuate, apex acute or rounded.

15–80 in larger spikes, spreading, light to dark brown, inconspicuously or shortly veined on each face, broadly elliptic or orbiculate to sharply obovate, flat except over achene, 4–6.1 × 3–4.4 mm, 0.45–0.6 mm thick, sometimes nearly leathery, base rounded, margin flat, including wing 0.7–1.5 mm wide, smooth;

beak spreading, light brown at tip, flat, 0.7–1.6(–1.8) mm, 1/3 length of body, ciliate-serrulate, abaxial suture with hyaline, pale brown margin, distance from beak tip to achene 2–3 mm.

appressed to ascending, whitish green to brown, conspicuously 10–19-veined abaxially, conspicuously 4–10-veined adaxially, at least 3 adaxially veins longer than achene, lanceolate to ovate, plano-convex, 6–8 × 1.7–2.4 mm, 0.5–0.9 mm thick, margin flat, including wing (0.2–)0.3–0.5 mm wide, ciliate-serrulate at least distally;

beak green, red-brown, brown, or gold, white-hyaline at tip, cylindric, unwinged, ± entire to 1 mm or flat, ± ciliate-serrulate, abaxial suture with conspicuous white margin, distance from beak tip to achene (2.8–)3.2–4.6 mm.

oblong, 1.5–2 × 0.9–1.2 mm, 0.3–0.5 mm thick.

elliptic to ovate-elliptic, 2.2–3 × (1.1–)1.3–1.8 mm, 0.5–0.7 mm thick.

scales white-hyaline or brown with pale brown or green 1-veined midstripe, lanceolate, 3.3–4 mm, as long as and narrower than perignyia, apex acute or obtuse.

scales whitish green or gold, with greenish to gold midstripe, lanceolate or ovate, 5.8–7.6 mm, ± equaling perigynia, concealing beaks, margin white, 0.2–0.7 mm wide, apex acute to acuminate.

= 33+III.

scales with white-hyaline margin (0.2–)0.3–0.7 mm wide.

= 68, 70.