Flora of North America species comparison

erect to ascending, leafy, stiff.

erect to excurved, filiform, leafy, ± terete.

shorter than scape;

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

shorter than culm;

blades ascending, filiform, proximally to 1.5(–2)mm wide, apex trigonous, tapering, setaceous.

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

primary leafy bract linear, stiff, exceeding clusters.

lateral spikelet clusters (0–)1–2, distant, terminal cluster ellipsoid to broadly turbinate or hemispheric, branches ascending; leafy bracts setaceous, overtopping clusters.

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.

red-brown to deep brown, lanceoloid, (4–)5–6(–7) mm, apex acute;

fertile scales lanceolate, 4–5(–6) mm, apex acuminate, midrib often excurrent as awn.

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

bristles 5–6, longest reaching at least past tubercle base, mostly to tip or beyond, 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.

2(–3) per spikelet, (2.3–)2.5–2.6(–3) mm with pedicellar joint, receptacle, and tubercle;

body lustrous, pale brown to deep brown, obovoid to ellipsoid, lenticular, 1–1.5 × 1 mm, margins narrow, flowing to tubercle;

surfaces longitudinally finely lined, transversely very finely ridged with wavy rows of very narrow, vertical lattices, sometimes also with lines of shallow pits;

tubercle triangularsubulate, (0.7–)1–1.3(–1.5) mm, base lunate, margins setulose proximally.