Flora of North America species comparison

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

to 80 cm.

sheaths hispidulous;

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

blades 3–8 mm wide.

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 3–5 spikes;

peduncles of proximal spikes exserted more than 1 cm;

proximal bracts with blade (10–) 15–50 mm, sheaths cylindric to ± expanded to mouth, 20–37 mm, mouth with narrow, ± purple band at top, usually Y- or V-shaped, mouth 0.7–1.8 mm wide.

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.

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.

ascending, usually purple or red-brown, veins usually indistinct, ovate to elliptic, 3.2–5.5 × 0.9–1.7(–2) mm, margins flat, less than 1/2 mature achene width, margins setose-ciliate distally, usually at least sparsely hispidulous to shortly setose;

beak ± distinct, apex brown to purple, setose-ciliate, distance from beak tip to achene apex usually more than 2 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.

obovoid, body 1.5–2 × 0.8–1 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 purple or brown with pale, usually indistinctly veined, ovate to elliptic, 2.3–3.8 × 0.8–1.7 mm, midvein and margins ciliate, apex obtuse to short-awned.

scales 5.2–6.9 × 1.5–1.7 mm.

scales purple or reddish brown with pale midvein, ovate to obovate, 3–4.4 × 1–1.4 mm, margins slightly ciliate, apex obtuse.

3.4–4.2 mm.

1.5–3 mm.

spikes pistillate or often androgynous, purple to brown, proximal spikes pendent to erect, 14–25 × 4–7 mm.

spike staminate or androgynous, ± erect, 10–21 × 4.5–6 mm.