Flora of North America species comparison

10-42 cm, erect or decumbent, much branched below;

internodes mostly scabrous, scabrous or hispidulous below the nodes.

16-50 cm, decumbent, rooting at the lower nodes;

nodes retrorsely pilose;

internodes smooth or scabridulous.

usually shorter than the internodes, flattened below, glabrous, scabridulous or smooth, striate;

ligules 1.5-3 mm, hyaline, acute, lacerate, with lateral lobes;

blades 1-5(7) cm long, 0.8-1.6(2) mm wide, flat or involute, scabrous abaxially, pubescent adaxially.

1.5-8.5 cm, sparsely or densely pilose, hairs to 3 mm, papillose-based;

ligules 0.5-0.8 mm, membranous, truncate, erose;

blades 2-6 cm long, 1.5-4 mm wide, flat, bases distinctly narrowed to the junction with the sheath, surfaces scabridulous and sparsely pilose, hairs papillose-based.

4-23 cm long, 0.5-2 cm wide, usually partially included in the subtending sheaths at maturity;

primary branches 20-45 mm, ascending, closely appressed;

pedicels 1-5 mm, appressed, scabrous;

disarticulation above the glumes.

6-10.5 cm long, 2.0-4.5 cm wide, secund, open;

primary branches 0.8-3.5 cm, secund, spreading at right angles or somewhat reflexed, with 2-5 spikelets;

secondary branches not developed;

pedicels 1-5 mm, scabrous or shortly pilose, hairs papillose-based;

disarticulation at the base of the primary branches.

4-7.5 mm, borne singly.

4-8 mm, dimorphic with respect to the glumes, proximal spikelets on each branch almost sessile.

1-2 mm, 1-veined, veins conspicuous, scabrous, and greenish basally, apices obtuse to subacute, often erose;

lemmas 4-6.2(7.5) mm, narrowly lanceolate, terete, mostly smooth, scabrous distally, hairy on the calluses and lower 1/4 of the margins, hairs 0.2-0.3 mm, whitish, lemma bodies not appearing 5-veined, apices acuminate, awned, awns 10-30 mm, straight, scabrous;

paleas 3.8-5.7(7) mm, narrowly lanceolate;

anthers 0.3-1.1 mm, purplish.

of proximal spikelets on each branch subequal, 0.2-0.7 mm, orbicular, truncate, often erose, unawned;

glumes of distal spikelets on each branch markedly unequal;

lower glumes to 8 mm, 1-veined, acute, usually awned, awns 0.5-3 mm;

upper glumes orbicular, acute, sometimes awn-tipped;

lemmas 4.0-7.6 mm, linear to broadly lanceolate, light greenish, smooth or scabrous, usually with greenish veins, apices acuminate, awned, awns 6-19 mm, usually straight, scabrous;

paleas 3.7-6.8 mm, narrowly lanceolate, coarsely papillate or almost smooth, acuminate;

anthers 0.4-0.8 mm, yellowish.

1.6-3 mm, narrowly fusiform, brownish to pinkish.

1.8-3 mm, oblong-ovoid, flattened, brownish.

spikelets usually present in the axils of the lower leaves.

= unknown.

= 20.