Flora of North America species comparison

to 60 cm × 1.5 mm, scabrous.

(35–)40–110 cm;

vegetative culms few, inconspicuous, with 6–8 leaves, not strikingly 3-ranked.

sheaths usually all with blades;

proximal 2–3 sheaths to 10–15 cm with reduced blades shorter than sheath, green, fronts herbaceous, prominently veined, not splitting, apex truncate, fronts of distal sheaths hyaline, rugose, indistinctly linearly veined, apex colorless, hyaline, convex, entire;

ligules obtuse, 1.5 mm, free limb to 0.1 mm;

blades not clustered at base, not epistomic, to 40 cm × 5 mm.

sheaths adaxially white-hyaline, summits concave or truncate, prolonged beyond collar to 2.5 mm, papillose at least near apex;

distal ligules 1–5 mm;

blades 3–4 per fertile culm, 2.5–25 cm × 2–5 mm, usually adaxially papillose.

very condensed, ovoid or shortly cylindric, with 5–10 indistinguishable branches, to 2.5 × 1.5 cm;

proximal internode not visible, not more than 3 mm;

proximal bract scalelike, inconspicuous.

open, pale brown, 0.24–0.62 cm × 8–15 mm;

proximal internode 5–17 mm; 2d internode 3–10 mm;

proximal bracts scalelike, with bristle tips shorter than inflorescences.

3–6(–8), distant, distinct, ovoid to clavate, 7–21 × 5.5–12 mm, base rounded to long tapered, apex rounded.

pale brown, 9–11-veined abaxially, 5–7-veined adaxially, to 3.5 × 1.5 mm, base distended only slightly proximally, cordate;

stipe to 0.2 mm;

beak to 2 mm, margins serrulate, apex bidentate, teeth to 0.1 mm.

15–80 in larger spikes, ascending or ascending-spreading, green to pale whitish green with reddish brown margin, conspicuously 8–12-veined abaxially, 4–8-veined adaxially, broadly elliptic to nearly orbiculate, (4.5–)5.1–6.7(–7.1) × (2.4–)2.8–4.2 mm, 0.5–0.7 mm thick, membranaceous with brown achene visible through hyaline adaxial face, margin flat, including wing 0.8–1.2 mm wide, often erose, scalloped, or with an irregular tooth, smooth;

beak pale brown at tip, flat, ciliate-serrulate, abaxial suture inconspicuous, distance from beak tip to achene 2.4–3.7 mm.

obovate, to 1.5 × 1 mm;

stalk to 0.2 mm;

persistent style base cylindric.

elliptic to oblong, 1.6–2.2 × 1.1–1.6 mm, 0.5 mm thick.

hyaline, brown, distinctly shorter than perigynia.

scales reddish brown with green midstripe, lance-ovate to ovate, 3.1–5.4 mm, 1.9–3.2 times as long as wide, (1–)1.4–2.3 mm shorter than perigynia, narrower than perignyia, apex obtuse to acute.

(2.4–)2.8–4.2 mm.

scales obtuse.

= 76, 78.