Flora of North America species comparison

nearly distichous, spreading to ascending, 1/2 length of culms;

sheath margins entire, backs smooth to pubescent;

ligule present, complete;

blades narrowly linear, proximally flat, 2–3.5(–4) mm wide, margins scabrid-ciliate, abaxial surface sometimes pubescent.

nearly distichous, 1/2 to equal length of culms;

sheaths bristlyciliate apically, backs glabrous or hirtellous;

ligule present, complete;

blades narrowly linear, 1–1.5(–2) mm wide, flat to shallowly involute, margins ciliate-scabrid, adaxial and abaxial surfaces glabrous or pubescent.

anthelae simple or compound, longer than wide;

scapes wandlike, nearly terete or slightly compressed, distally 1 mm thick, marginal ribs scabrid;

longest primary involucral bract shorter than panicle.

anthelae simple or compound, mostly open, diffuse, ascending-branched, longer than broad;

scapes slender, 1 mm thick, angular;

proximalmost involucral bract longer or shorter than anthela.

pale dull brown, lance-ovoid to cylindric-ellipsoid, 10–12 mm;

fertile scales ovate, 3.5–4 mm, apex broadly acute, ciliate, surface uniformly puberulent, midrib excurrent as mucro or cusp.

tan to brown or redbrown, ovoid to lance-ovoid, 3–8 mm;

fertile scales broadly oblong to ovate, 2 mm, acute to obtuse-angled, smooth, midrib reaching apex or excurrent as mucro.

stamens 3;

styles 2-fid, flat, fimbriate.

stamens 1(–2);

styles 2-fid, flat, fimbriate.

dark brown, lenticular-obovoid, 1.5 mm, finely cancellate, with 20 or more longitudinal rows of horizontally rectangular pits per side.

white to brown, often iridescent, lenticular or obovoid to pyriform-obovoid, 1 mm, cancellate, with 5–12 longitudinal ribs per side, alternating with as many rows of horizontally rectangular pits;

warts of achene more usually distributed, or achene (rarely) smooth.

= 20.

= 30.