Flora of North America species comparison

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

15–60 cm, scabrous to smooth 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.

proximal sheaths fibrillose, bladeless, purple tinged, 2–6 mm diam.;

ligules 2–6 mm, as long as or longer than wide;

blades of vegetative culms 10–30(–50) cm;

those of fertile culms green, flat or folded, less than 18 cm × 1.5–5.5 mm.

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.

4–19 cm, 1.2–2 times longer than proximal bract;

proximal bracts 2–12 cm, sheaths 0.5–3 cm, blades 1.5–10 cm; pistillate spikes occasionally staminate at apex, linear-oblong, 1–3.5(–5) cm × 2.5–7 mm.

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.

loosely to densely arranged, 3.4–4.2 mm;

beak not flared, 0.5–1 mm.

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

pale to dark brown, (2–)2.3–2.7 × 1.6–2 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 purple tinged, apex broadly acute or obtuse, sometimes subapically cuspidate, papillose.

1.5–2.5 mm.