Flora of North America species comparison

9-85 cm, erect, sometimes decumbent at the base, sometimes rooting at the lower nodes, usually with 4-7 nodes.

10-75 cm, erect or geniculate, with 2-5 nodes.

basal and cauline;

sheaths smooth or scabrous;

ligules 1-4.8(7.5) mm, dorsal surfaces scabrous, apices truncate to obtuse, erose-lacerate, sometimes ciliolate;

blades 2-12 cm long, 2-10 mm wide, upper blades broader than those below, flat.

basal and cauline;

sheaths smooth;

ligules 0.3-2 mm, shorter than wide, dorsal surfaces usually scabridulous, sometimes smooth, apices truncate to rounded, erose-ciliolate, sometimes lacerate;

blades 3-10 cm long, 1-5 mm wide, flat.

2-10 cm long, 0.5-2 cm wide, narrow and spikelike to dense, lobed-lanceolate, bases exserted or enclosed by the upper sheaths at maturity;

branches to 1.5 cm, scabrous, appressed, branching at the base and mostly hidden by the spikelets;

pedicels about 0.4-3 mm.

3-20 cm long, less than 1/2 the length of the culm, (1)2-12 cm wide, stiffly erect, widely ovate, open, exserted from the upper sheaths at maturity, lowest node with (2)3-9(13) branches;

branches smooth or scabridulous, spreading during and after anthesis, spikelets usually confined to the distal 1/2, lower branches 1.5-7 cm;

pedicels 0.4-3.3 mm, adjacent pedicels divergent.

lanceolate to narrowly ovate, yellowish, sometimes tinged with purple, or greenish purple.

lanceolate or oblong, purplish brown to greenish.

generally equal, 2-3.3 mm, 1-veined, densely scabrous, aculeolate on the veins, narrowly acute to acuminate or somewhat mucronate, mucros to about 0.5 mm;

callus hairs to 0.3 mm, usually dense;

lemmas 1.5-2.1 mm, smooth or scabridulous, translucent, (3)5-veined, veins prominent to obscure, sometimes prominent only distally, apices acute to obtuse, veins usually extended as teeth up to 0.3 mm, unawned or awned from above midlength, awns to 3.5 mm, straight, readily deciduous;

paleas 0.3-0.7 mm, thin;

anthers 3, 0.5-2 mm.

subequal, 1.7-3 mm, 1-veined, acute;

lower glumes scabridulous over the midvein towards the apices;

upper glumes scabridulous or smooth over the midvein;

calluses glabrous, or with a few hairs to 0.1 mm;

lemmas 1.2-2.5 mm, smooth, glabrous, opaque to translucent, 3(5)-veined, veins typically prominent, apices obtuse to acute, usually entire, sometimes the veins excurrent to 0.5 mm, usually unawned, rarely awned, sometimes varying within a panicle, awns to 2 mm, mid-dorsal, straight or geniculate;

paleas 0.6-1.2(1.4) mm, typically at least 1/2 the length of the lemmas, veins visible;

anthers 3, 0.8-1.3 mm.

1-1.5 mm;

endosperm solid.

0.8-1.5 mm;

endosperm solid.

= 42.

= 28.