Flora of North America species comparison

developing from the midculm nodes and above, occasionally also at the lower nodes, several to many branches per node, branchlets of the lower branches not thornlike.

very short, not thorny, the central branch at each node often tardily developed, branches not developing from the lower nodes, branchlets of the lower branches not thornlike.

leaves: sheaths glabrous to sparsely hispidulous;

ligules 0.5-1.5 mm, glabrous, truncate, entire;

auricles 0.5-1.5 mm, falcate, hardened, persistent;

fimbriae few, 0.5-1.5 mm, spreading;

blades 6-30 cm long, 1-4 cm wide, glabrous, abruptly acuminate.

leaves: sheaths striate, glabrous or sparsely hispidulous, margins very shortly ciliate;

auricles very small, rounded;

fimbriae many, to 5 mm, fine, wavy;

ligules to 1 mm, truncate, glabrous, entire;

blades 15-30 cm long, 3-6 cm wide, oblong-lanceolate, abruptly acuminate, abaxial surfaces pubescent initially, becoming glabrous, adaxial surfaces glabrous.

leaves promptly deciduous, with dense, appressed, brown pubescence, lower sheaths broader than long, apices broader than the base of the blades;

auricles well developed, to 5 cm long and 1.5 cm wide, equal, ovoid to falcate-spreading, dark;

fimbriae to 15 mm, dense, wavy, light;

blades 4-5 cm long, 5-6 cm wide, appressed to the culm, usually persistent, triangular, abaxial surfaces glabrous, adaxial surfaces densely dark pubescent towards the base, basal margins ciliate or with stiff hairs;

ligules about 3 mm, shortly ciliate.

leaves promptly deciduous, oblong, initially brown-sericeous, becoming glabrous, rounded distally;

auricles absent or very small and rounded;

fimbriae few, to 3 mm, curved;

ligules to 2 mm, entire or finely serrulate;

blades broadly subtriangular, usually with concave margins, abaxial surfaces glabrous, adaxial surfaces antrorsely hispid, apices acuminate.

12-35 mm, with 5-10 florets, always strongly grooved along the center, appearing 2-cleft.

with 6-10 florets.

= 64.

= unknown.