Flora of North America species comparison

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

13–50 cm, scabrous distally;

bases (remnants of old leaves) weakly to strongly fibrous.

sheaths hispidulous;

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

blades green, 0.7–4.5 mm wide, herbaceous, smooth to scabrous abaxially, smooth to scabrous adaxially.

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.

with both staminate and pistillate spikes;

peduncles of staminate spikes (0.8–)2.5–20 mm;

proximal cauline bracts leaflike, green or reddish brown, 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.

proximal pistillate spikes 1–3(–4) (basal spikes 0, rarely 1);

cauline spikes overlapping or somewhat separated, with (2–)5–15 perigynia; staminate spikes 8–30 × 1.3–4.1 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.

yellowish green to pale brown or olive, veinless, obovoid, 2.8–4.6 × 1.5–2.2 mm, as long as wide;

beak straight, pale green, occasionally with reddish tinge, 0.4–1.3 mm, weakly ciliate-serrulate, apical teeth 0.1–0.7 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.

dark brown, obovoid to globose, obtusely trigonous in cross section, (1.4–)1.6–2.5 × 1.5–2.2 mm.

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 5.2–6.9 × 1.5–1.7 mm.

3.4–4.2 mm.

(1.5–)2–3.8 mm.

pistillate scales pale brown to dark reddish brown or purplish brown, narrow white margins, elliptic to ovate, 2.6–5.4 × 1.2–2.6 mm, equaling perigynia, apex acute to acuminate or short-awned (rarely obtuse); staminate scales with white margins 0.4–0.8 mm wide, lanceolate to obovate, 3.6–6.7 × 1.2–1.7 mm apex obtuse to long-acuminate.

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