Flora of North America species comparison

coarse, 1.8–2.6 mm thick, typically with long, unbranched segments from which shoots arise singly every few nodes.

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

sharply trigonous, 8–40 cm, scabrous-angled distally.

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 dark brown;

sheaths with hyaline inner band, apex not prolonged, glabrous;

ligules 0–1.2 mm;

blades 1.7–3.8 mm wide.

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.

1.2–2.5 cm;

spikes 3–12, usually unisexual; staminate spikes lanceoloid; pistillate spikes compact, ovoid.

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.

dark brown to nearly black at maturity, essentially veinless adaxially, usually ± stipitate, ovate, plano-convex, 3.1–4.2 × 1.3–1.8 mm, dull;

beak 0.7–1.5 mm, apex ± hyaline, obscurely bidentate.

circular to elliptic-circular, 1.8–2.1 × 1.6–1.8 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 dark reddish brown to nearly purple-black, with broad hyaline margins, ovate, apex acute to acuminate-awned, shiny.

1.5–2.5 mm.

1.7–3.1 mm, apiculus bristly hairy (30X).