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.

12-75 cm, erect, with up to 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.

mostly basal, basal leaves usually persistent;

sheaths smooth or scabridulous, ligules 1.2-6.3 mm, usually scabridulous, sometimes smooth, truncate to rounded, lacerate-erose;

blades 10-30 cm long, (1)2-4 mm wide, flat, culm blades usually less substantial than the basal blades.

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.

8-35(60) cm long, (1.5)2.5-14 cm wide, lanceolate-ovate, usually 3 times longer than wide, open, bases exserted from the upper sheaths at maturity, lowest node with 1-15 branches;

branches scabrous to scabridulous, ascending, mostly branching above midlength, lower branches occasionally branching to near the base, spikelets somewhat clustered towards the tips, lower branches 2-10 cm, mostly longer than 3 cm;

pedicels (0.5)1-3.5(6) mm;

secondary panicles not present.

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

lanceolate to narrowly ovate, yellowish green to 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.

unequal, 2-3.6 mm, 1(3)-veined, scabrous on the midvein, occasionally also sparsely scabridulous over the body, acute to acuminate;

callus hairs to 0.2 mm, sparse;

lemmas 1.5-2.5 mm, usually smooth, sometimes scabridulous or pubescent, translucent to opaque, 5-veined, veins faint or prominent distally, apices acute to obtuse, usually entire, sometimes erose or toothed, teeth to about 0.4 mm, usually unawned, sometimes awned from midlength, awns to 2 mm, straight, not exserted, sometimes awned and unawned spikelets present on the same plant;

paleas absent, or to 0.2 mm and thin;

anthers 3, 0.5-1.2 mm.

1-1.5 mm;

endosperm solid.

1-1.6 mm;

endosperm semisoft.

= 42.

= 42.