Flora of North America species comparison

erect to ascending, leafy, stiff.

erect or ascending, leafy, trigonous, slender.

shorter than scape;

blades narrowly linear, (1–)2–3 mm wide, margins involute, apex trigonous, tapering.

all exceeded by culm;

basal blades spreading, often curled, distal longer, all proximally flat, 3–5 mm wide, apex trigonous, subulately tapering.

clusters 1–2, if 2 then close together, dense, broadly turbinate to hemispheric or lobedglobose;

primary leafy bract linear, stiff, exceeding clusters.

clusters 3–5, proximalmost distant, longest pedunculate, fascicles broadly turbinate to hemispheric; leafy bracts of distal groups mostly exceeded by inflorescence.

light to dark redbrown, lanceovoid, 3.5–6 mm, apex acuminate;

fertile scales ovate, convex, 3–3.5(–4) mm, apex acuminate, low midrib excurrent or not.

lanceovoid, (3.5–)4–5 mm;

fertile scales broadly ovate to ± orbiculate, cupulate, rounded, 3 mm, apex apiculate to cuspidate, midrib excurrent.

perianth bristles 6, reaching at least to tubercle base, plumose from base to more than 1/2 length of fruit body.

perianth bristles 6, overtopping tubercle (or at least its base), antrorsely barbellate.

1(–2) per spikelet, (2–)2.5–2.8(–3) mm;

body redbrown or brown, tumidly obovoid, (1.5–)2–2.2 × 1–1.7 mm;

surfaces interruptedly transversely rugulose;

tubercle broadly conic, 0.5–0.8(–1) mm, base broadly 2lobed, apex often apiculate.

1–3 per spikelet, 2.3–3 mm;

body brown, strongly compressed proximally, biconvex distally, broadly obovoid, 1.8–2.2 × 1.5 mm;

surfaces strongly transversely rugose, intervals with rows of narrow, vertical alveolae;

tubercle triangular, flat, 1 mm, base lunate, capping fruit apex, apiculate.