Flora of North America species comparison

0.2–10 cm, 0.6–1.2 mm in diam.

arising singly or in loose tufts of 2–6(–12), 10–40(–60) cm, apically slightly scabrous.

13–50 cm, scabrous distally;

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

proximal 1–4 reduced to bladeless or nearly bladeless sheaths;

foliage leaves 1–2(–3) per culm;

ligules about as wide as long;

blades mostly 1–3 (proximal blade) or 5–13 (distal) cm × 0.5–1.6 mm.

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

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.

consisting of slender terminal cone of (1–)2–4 staminate flowers and (1–)2–6(–7) pistillate flowers, 3–10 (often 5–8) × 2–8 (immature fruit) or to 17 (mature fruit) 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.

light green, becoming straw colored or pale brown, lance-subulate to narrowly elongate-oblong, (5–)5.9–7.8 × 0.7–1.1 mm, long-tapering;

beak indistinct;

rachilla vestigial.

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.

2–2.4 × 0.8–1 mm;

style exserted 0.2–1.3 mm beyond orifice of beak.

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

scales 3.7–5.9 mm, wider than and 2/3 length of perigynia.

scales closely appressed.

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.

(1.5–)2–3.8 mm.

3.

= ca. 74, 76.