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.

4-20 cm.

smooth, upper sheaths inflated;

ligules (0.6)1-1.5 mm, dorsal surfaces scabrous, apices truncate to rounded, lacerate to erose-ciliolate;

blades 1-2.5 cm long, 1-2 mm wide, flat or folded.

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.

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.

1.5-6 cm long, 0.4-2 cm wide, initially lanceolate, becoming ovate and diffuse, bases sometimes enclosed in the upper sheaths;

branches 1-3 cm, erect to spreading, scabrous;

pedicels 0.5-6.3 mm.

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

ovate, green, slightly to strongly tinged with purple.

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.

equal, 2-2.5 mm, 1-veined, acuminate;

lower glumes scabrous on the midvein;

upper glumes smooth or scabrous on the midvein;

callus hairs to 0.1 mm, sparse;

lemmas 1.3-1.7 mm, scabrous, translucent to opaque, 5-veined, veins mostly obscure, apices truncate, entire, erose, or the veins excurrent to about 0.12 mm, unawned;

paleas to 0.2 mm, thin;

anthers 3, 0.5-0.9 mm, often retained at the apices of the caryopses.

1-1.5 mm;

endosperm solid.

1.2-1.5 mm;

endosperm semisoft.

= 42.

= unknown.