Flora of North America species comparison

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

50–90 cm;

vegetative culms with numerous leaves spaced evenly along distal 1/2.

sheaths hispidulous;

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

sheaths adaxially green-veined nearly to collar with V-shaped hyaline band extending 4–20 mm proximal to collar, somewhat loose, expanded near summit, ± wing-angled, adaxially firm, summits thin, U-shaped to rounded, sometimes shortly prolonged beyond collar;

distal ligules 4–9 mm;

blades 3–6 per fertile culm, 18–40 cm × 3–7 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.

nodding, open at least proximally, pale brown, 2.5–6 cm × 7–14 mm;

proximal internode 5–12(–18) mm; 2d internode 3–11 mm;

proximal bracts scalelike, sometimes bristlelike to 3 cm.

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.

8–15, proximal spikes well spearated, nearly globose, 9–12 × 6–8(–9) mm, base tapered, apex rounded.

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.

usually 15–30 per spike, ascending to reflexed, with divergent beak, pale brown; conspicuously (3–)5–8-veined abaxially, conspicuously 3–6-veined adaxially, lanceolate, flat to plano-convex, thin, 2.9–4.3 × 1.2–1.6 mm, 0.3 mm thick, margin flat, including wing 0.2 mm wide;

beak sometimes red-brown at tip, flat, ciliate-serrulate, distance from beak tip to achene 1.6–2.4 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.

ovate to oblong, 1.1–1.7 × 0.6–1 mm, 0.3 mm thick.

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 to brown with brown or green midstripe not reaching tip, oblong-lanceolate to oblong-ovate, 2–2.7 × 0.9–1.5 mm, shorter and narrower than perigynia, apex obtuse to nearly acute.

scales 5.2–6.9 × 1.5–1.7 mm.

3.4–4.2 mm.

= 64.