Flora of North America species comparison

normally horizontal for only a short distance before turning up to form a culm, hollow-centered, air canals present.

normally remaining horizontal, sometimes hollow-centered, air canals absent.

leaves: abaxial ligules fimbriate to lacerate, sometimes ciliate;

blades 7-23 cm long, 1-2 cm wide, coriaceous, persistent, evergreen, bases rounded, abaxial surfaces densely pubescent or glabrous, strongly cross veined, adaxial surfaces pubescent.

leaves: abaxial ligules usually ciliate, sometimes glabrous;

blades subcoriaceous, persistent, evergreen, 8-15 cm long, 0.8-1.3 cm wide, bases rounded, abaxial surfaces glabrous or pubescent, strongly cross veined, adaxial surfaces glabrous or almost so.

3-5 cm, with 6-12 florets, the first occasionally sterile.

4-7 cm, greenish or brownish, with 8-12 florets.

unequal, glabrous or pubescent;

lowest glume obtuse to acuminate or absent;

lemmas 1.2-2 cm, glabrous or nearly so.

unequal, glabrous or pubescent, lowest glumes obtuse to acuminate or absent;

lemmas 1.2-2 cm, usually appressed-hirsute to canescent, sometimes pubescent only towards the base and margins.

oblong, beaked, a rudimentary hooked style branch present below the beak.

oblong, beaked, without a style branch below the beaks.

leaves persistent to tardily deciduous;

sheaths 11-18 cm;

fimbriae 1.5-8.5 mm;

blades 2.5-4 cm.

leaves deciduous;

sheaths 9-15 cm;

fimbriae 2.2-7 mm;

blades 1.5-3.5 cm.

of 9-12 leaves;

blades 20-30 cm long, 1.8-3.2 cm wide, lanceolate to ovate-lanceolate.

of 6-8 leaves;

blades 16-24 cm long, 2-3.2 cm wide, lanceolate to ovate-lanceolate.

branches usually 50+ cm, basally erect and distally arcuate, terete, with 3-4 compressed basal internodes, basal nodes developing secondary branches, lower elongated internodes terete in cross section.

branches to 25 cm, erect or nearly so, with 0-1 compressed basal internodes, lower elongated internodes flattened in cross section.

= unknown.

= 48.