Flora of North America species comparison

yellow-brown to dark brown at base, 15–60 cm.

25–120 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

sheaths hispidulous;

blades green, widest blades (3–)3.4–5.4(–6.5) mm wide, glabrous abaxially or sparsely hispidulous on midrib.

sheaths conspicuously green-veined adaxially nearly to apex, narrow hyaline band or sharp Y-shaped region at collar, adaxially firm, summits U-shaped, not prolonged;

distal ligules 1.5–4.5 mm;

blades 3–5 per fertile culm, 9–25 cm × 2–3.5 mm.

0.19–0.48 of culm height;

peduncles of lateral spikes smooth or barely scaberulous;

peduncles of terminal spikes (4.2–)7.5–37(–43) mm, much exceeding lateral spikes;

proximal bract with sheath tight, abaxially scabrous, sheath front apex convex, elongated (0.6–)1.6–4.9(–6.6) mm beyond apex;

ligules 3.3–5 mm;

distal bract usually much exceeding terminal spike.

erect, open, yellow-green to brown, 1.5–4 cm × 4–12 mm;

proximal internode 3–12 mm; 2d internode 3–9 mm;

proximal bracts scalelike, with bristle tips, shorter than inflorescences.

3–5, separate or distal 2–4 spikes overlapping;

lateral spikes pistillate, with 2–7 perigynia, 6–29 × 3.8–6.8 mm, ratio of spike length (in mm) to flower number = 3.5–4.8;

longest terminal spikes 14–34(–42) × 1.3–3(–3.5) mm.

2–8, distinct, ellipsoid to globose, 5–13 × 4–6.5 mm, base acute, apex rounded; staminate portion of well-developed spikes less than 2 mm.

distichously imbricate, 52–59-veined, unwrinkled, obovoid or narrowly obovoid, obtusely triangular in cross section, (4.5–)4.6–5.6(–6.2) × 1.9–2.2(–2.3) mm, (2.1–)2.3–2.8(–3) times as long as wide, dull, base gradually tapered, apex abruptly contracted;

beak excurved, (0.5–)0.8–1.3 mm.

spreading, green to light brown, conspicuously 4–many-veined on each face, winged to base, obovate, flat except over achene or somewhat plano-convex, 2.6–4.5 × 1.5–2.7 mm, 0.3–0.45 mm thick, margin flat, including wing 0.4–0.7 mm wide;

beak pale brown at tip, flat, ciliate-serrulate, abaxial suture with white or brown hyaline margin, distance from beak tip to achene 1–2 mm.

obovoid-ellipsoid, 3.2–3.9(–4.2) × (1.6–)1.8–2.1 mm, tightly enveloped by perigynia;

stipe bent 45–70°, 0.4–0.6 mm;

beak bent more than 90°, 0.3–0.5 mm.

oblong, 1.3–1.7 × 0.75–1 mm, 0.3–0.4 mm thick;

styles laterally sinuate.

scales (4.1–)5.6–9.4(–11.6) × 1.6–2.6(–3.3) mm, margins whitish, denticulate, apex with awn 1.1–6.8 mm.

scales white-hyaline or brown, with green midstripe, broadly lanceolate or ovate, 2.5–3.4 mm, longer and narrower than perigynia, apex acute.

scales 5.2–6.9 × 1.5–1.7 mm.

3.4–4.2 mm.

= 66.