Flora of North America species comparison

30–140 cm.

30–100 cm;

vegetative culms few, inconspicuous, with fewer than 15(–17) leaves, not strikingly 3-ranked.

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

distal ligules 2.8–8 mm;

blades 3–7 per fertile culm, 11–50 cm × 2.5–6 mm.

sheaths adaxially white-hyaline, summits U-shaped to truncate, sometimes prolonged 1–2 mm beyond collar, not puckered, finely papillose;

distal ligules 2.5–4.8 mm;

blades 3–6 per fertile culm, 14–32 cm × 1.5–3 mm.

dense or open, pale green or brown, 2–6.5 cm × 7–20 mm;

proximal internode 3–13 mm; 2d internode 4–10 mm;

proximal bracts scalelike with bristle tips shorter than inflorescences.

compact to open, occasionally elongate and arching or nodding, reddish brown or straw colored, 1.5–5 cm × 7–15 mm;

proximal internode 5–15 mm; 2d internode 3–7 mm;

proximal bracts scalelike with bristle tips shorter than inflorescences.

3–11, distant, distinct, ellipsoid to ovoid, 6–20 × 4–9 mm, base rounded or short-acute, apex broadly acute to obtuse.

(4–)6–8(–10), distinct, ovoid, 7–15 × 5–9 mm, base rounded, apex rounded or nearly acute.

± spreading, light or golden brown, faintly 3–8-veined on each face, obovate, flat except over achene, 4–5.5 × 2.5–3.8 mm, 0.4–0.5 mm thick, margin flat, including wing 0.8–1.5 mm wide;

beak light brown at tip, flat, 0.85–2.2 mm, ciliate-serrulate, abaxial suture with light brown margin, distance from beak tip to achene 1.8–3 mm.

15–80 in larger spikes, ascending, light green to straw colored, conspicuously 5–9-veined abaxially, veinless or faintly 1–5-veined adaxially, broadly ovate to ovate-orbiculate, plano-convex, 3.3–5 × 2.3–3.5 mm, 0.5–0.8 mm thick, irregular, margin flat, including wing 0.4–0.8 mm wide, with 1–2 veins in yellowish wing, smooth;

beak red-brown at tip, flat, 0.7–1.6(–1.8) mm, ciliate-serrulate, abaxial suture ± conspicuous, distance from beak tip to achene 1.8–3.1 mm.

oblong, 1.7–2 × 0.9–1.1 mm, 0.3–0.4 mm thick.

ovate or orbiculate, 1.4–1.8 × 1.1–1.5 mm, 0.5–0.7 mm thick.

scales white-hyaline or tan, with green midstripe extending to tip, lanceolate, 2.8–3.5(–3.8) mm, shorter or longer and much narrower than perigynia, apex firm, acuminate or awned to 0.8 mm.

scales light yellow-brown with paler midvein, lance-subulate or lanceolate, occasionally broadly lanceolate, (3.2–)3.4–3.8(–4.2) mm, 0.2–1.3 mm shorter than perignyium beaks, narrower than perigynia, margins white-hyaline, 0.1–0.3 mm wide, apex acute.

1.3–2.6 mm.

= 74.

= 70, 74.