Flora of North America species comparison

sometimes solitary, narrowly linear, distally angular, glabrous.

ascending, from 1/3 as long to equally as long as culms, glabrous to pubescent;

sheaths apically ciliate;

ligule essentially absent or (in rhizomatous individuals) present, complete or incomplete;

blades narrowly linear, 1–2 mm wide, mostly strongly involute, scabrid-ciliate.

nearly distichous, mostly spreading, to 2/3 length of culms;

sheaths ciliate, sheath backs often pilose-hirsute;

ligule present, complete;

blades narrowly linear, 1.5–2.5 mm wide, flat or shallowly concave, margins scabrid, abaxial surface scattered-pilose, hirsute-ciliate at least proximally.

anthelae simple or compound, compact or diffuse, mostly broad, ascending-branching;

scapes slender, wandlike, 1 mm thick;

lower leafy involucral bracts exceeded by or exceeding panicle.

anthelae simple or compound, open, divaricately branched, mostly as broad as long;

scapes slender, 1 mm wide, distally slightly compressed;

proximalmost involucral bract exceeding or shorter than anthela.

variously red-brown, broadly ovoid to lance-cylindric, 5–10 mm;

fertile scales broadly ovate, obtuse or obtuse-angled, 2.5–3.5 mm, abaxially glabrous or variously puberulent, midrib excurrent as mucro.

pale brown or red-brown, ovoid to lanceoloid, 5–6 mm;

fertile scales broadly ovate, 1.5–2 mm, acute- to obtuse-angled, midrib short-excurrent as mucro.

stamens 3;

styles 2-fid, flat, fimbriate.

stamens 1–2;

styles 2-fid, flat, fimbriate.

yellowish to dark brown, lenticular-obovoid, 1 mm, with 11–20 vertical lines of horizontally rectangular or isodiametric, distinct or indistinct pits.

whitened-iridescent to brown, lenticular or pyriform-obovoid, 1 mm, cancellate, each face with 5–12 vertical rows of transversely oriented rectangular pits, achene margins distally papillose.

= 20.

= 20.