Flora of North America species comparison

(20–)30–100 cm, 1.5–3.5 mm wide basally, 0.7–1.2 mm wide distally.

50–115 cm;

vegetative culms few, inconspicuous, usually fewer than 12 leaves, not strikingly 3-ranked.

sheaths usually loose, proximal green-and-white-striped and green-and-white-mottled, with conspicous transverse veins on back, fronts white to hyaline, sometimes red dotted and transversely rugose, yellow or brown and thickened at mouth;

ligules 1–4.5 mm, shorter than to as long as wide;

widest leaf blades 3.5–5 mm wide.

sheaths glabrous, hyaline sometimes brown tinged band near collar, the summits U-shaped to truncate, ± equaling the base of the blade;

distal ligules 1.5–5.4 mm;

blades 3–6 per fertile culm, 3.5–40 cm × 1.5–4.6 mm.

with 5–10 spikes, (1.5–)2–5 cm × 8–13 mm;

proximal internodes shorter than to as long as proximal spikes;

proximal bracts to 3 cm;

spikes with 5–15 ascending to spreading perigynia.

open, erect to slightly arching, pale or golden brown, 2.4–5.5(–6.4) cm × 6.5–21 mm;

proximal internode 4–13(–18) mm; 2d internode 3–11 mm;

proximal bracts scalelike, with bristle tips to 1.5 cm.

4–8(–10), distinct, ovoid, 10–22 × 4–11 mm, base rounded to tapered, apex rounded to acute.

pale green to pale brown, veinless or weakly 2–5-veined abaxially, 3.4–4.6 × 1.9–2.8 mm, body somewhat spongy, thickened at base, margins serrulate distally;

beak 0.7–1.4 mm, apical teeth 0.3–1 mm.

15–80 in larger spikes, ± appressed, yellowish green to brown with paler margins, conspicuously 3–7-veined adaxially, 8–12-veined abaxially, 2–5 veins in wings, broadly ovate, broadly elliptic, or orbiculate, often strongly concave, (5.6–)6–7.1 × 3.3–4.6(–4.8) mm, 0.5–0.7 mm thick, margin flat, including wing 0.6–1.3 mm wide, smooth;

beak pale or golden brown at tip, strongly flattened, (1.2–)1.5–2.1(–2.3) mm, serrulate-margined to apex, abaxial suture yellow-green to copper-brown, distance from tip of beak to achene 2.8–4 mm.

circular to elliptic-circular, 1.8–2.1 × 1.6–1.8 mm.

broadly ovate to oblong, 1.8–2.4 × 1.3–1.9 mm, 0.5–0.7 mm thick, apiculum to 0.5–1.1 mm.

scales hyaline or pale brown with green, 1–3-veined center, ovate, 2.2–3.5 × 1.2–1.8 mm, body 2/3 as long to almost length of perigynia, apex acuminate to short-awned.

scales pale brown with narrow yellow-green to brown midstripe, lanceolate to narrowly ovate, (3.6–)3.9–5 mm, 2.4–3.1(–3.4) times as long as wide, barely or not reaching base of perigynium beaks, margin hyaline, apex firm and herbaceous, flat or inrolled, obtuse to acute.

1.5–2.5 mm.

(1.8–)2.2–3.6 mm.

scales obtuse to acuminate.

= 66, 68.