Flora of North America species comparison

to 60 cm × 1.5 mm, scabrous.

often curved, bluntly trigonous, 5–15 cm, smooth-angled distally.

sheaths usually all with blades;

proximal 2–3 sheaths to 10–15 cm with reduced blades shorter than sheath, green, fronts herbaceous, prominently veined, not splitting, apex truncate, fronts of distal sheaths hyaline, rugose, indistinctly linearly veined, apex colorless, hyaline, convex, entire;

ligules obtuse, 1.5 mm, free limb to 0.1 mm;

blades not clustered at base, not epistomic, to 40 cm × 5 mm.

basal sheaths brown;

ligules 0.4–1.6 mm;

blades folded to involute, ± equaling culms, 0.8–2.2(–2.5) mm wide.

very condensed, ovoid or shortly cylindric, with 5–10 indistinguishable branches, to 2.5 × 1.5 cm;

proximal internode not visible, not more than 3 mm;

proximal bract scalelike, inconspicuous.

1–1.8 cm;

spikes ca. 8–15, essentially indistinguishable in dense globose to ovoid head.

pale brown, 9–11-veined abaxially, 5–7-veined adaxially, to 3.5 × 1.5 mm, base distended only slightly proximally, cordate;

stipe to 0.2 mm;

beak to 2 mm, margins serrulate, apex bidentate, teeth to 0.1 mm.

dark brown, finely 5–9-veined abaxially, faintly veined or essentially veinless adaxially, clearly inflated, broadly elliptic, 3.6–5 × 1.9–2.6 mm, delicate and membranous, shiny;

stipe to 0.2 mm or essentially absent;

beak poorly defined, 0.6–1.1 mm, smooth or slightly scabrous-margined.

obovate, to 1.5 × 1 mm;

stalk to 0.2 mm;

persistent style base cylindric.

hyaline, brown, distinctly shorter than perigynia.

scales reddish brown to dark brown, ± translucent with broad whitish hyaline margins, broadly ovate, ± equaling perigynia, apex obtuse to acute, body shiny.

1–1.5 mm.