Flora of North America species comparison

arching to spreading, 5–31 cm, smooth or scabrous distally;

bases (remnants of old leaves) weakly or not at all fibrous.

50–115 cm;

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

blades pale green, shorter to longer than culms, 0.9–2.6(–3.2) mm wide, herbaceous, glabrous abaxially, scabrous adaxially.

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 both staminate and pistillate spikes;

peduncles of basal spikes slender, elongate, erect;

peduncles of distal spikes 0.6–4(–10) mm;

proximal nonbasal bracts leaflike, equaling or exceeding inflorescences.

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.

pistillate spikes 1–4 (basal spikes 0–2);

cauline spikes overlapping, separated by less than 7 mm, with 4–15 perigynia;

distal staminate spikes 3.1–11.3 × 0.7–2.7 mm.

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

yellowish green to grayish green, veinless, globose to obovoid, 2.3–3.1 × 1–1.4 mm, as long as or longer than wide;

beak often bent, pale green, occasionally with reddish brown tinge, 0.4–0.8 mm, ciliate-serrulate, apical teeth 0.1–0.2 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.

brown, obovoid, obtusely trigonous in cross section, 1.3–1.6 × 1–1.4 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.

pistillate scales pale to dark reddish brown, with narrow to broad white margins, ovate, 2–2.8 × 1–1.8 mm, shorter than perigynia, apex obutse, acute, or acuminate (cuspidate on some basal spikes); staminate scales ovate, 2.4–4 × 1–1.9 mm, apex acute to acuminate.

1.2–2.5 mm.

(1.8–)2.2–3.6 mm.

3.

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.

scales obtuse to acuminate.

= 66, 68.