Flora of North America species comparison

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

reddish brown to dark maroon at base; flowering stems 30–60 cm, much longer than leaves at maturity, 1–1.3 mm thick, sparingly pubescent.

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.

basal sheaths reddish brown, bladeless, sparingly pubescent;

others grading from maroon to green on back, brown-hyaline, often red dotted and pubescent on front, especially near apex;

blades flat, 2.7–12 mm wide, usually pilose, more densely so adaxially, margins long-ciliate, except in rare glabrous form.

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.

peduncles of lateral spikes 40–100 mm (proximal spikes) or less than 10 mm (distal spikes), pilose;

peduncles of terminal spike to 25 mm, pilose or rarely glabrous;

proximal bracts equaling inflorescence or more often shorter;

sheaths 5–87 mm;

blades 1–3 mm wide.

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.

golden green, sometimes red dotted, 2-ribbed and finely 8–10-veined, substipitate, loosely enveloping achene, ellipsoid, 2.5–4.2 × 1–1.8 mm, membranous, apex tapering to beak, entire surface pubescent, often densely so, except in rare glabrous form;

beak minutely bidentate, 0.8–1.4 mm, ciliate between apical teeth.

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

sessile, 2–3.1 × 1–1.7 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 white-hyaline at base and along margins, suffused with reddish brown near apex, with broad green midrib, broadly ovate, nearly as long as perigynia, apex truncate or rounded with ciliate green awn 1 mm, otherwise glabrous.

1.5–2.5 mm.

spikes 2–4, 1 per node, well separated (proximal spikes) or crowded and overlapping staminate spike (distal spikes), erect, pistillate with 20–35 perigynia attached 1–1.5 mm apart, cylindric, 5–30 × 2–7 mm.

spike staminate, rarely gynecandrous, sessile or more commonly pedunculate, 10–27 × 2.2–6 mm.

= 70, 72.