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.

20-80 cm, erect, sometimes rooting at the lower nodes, with 3-10 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.

usually mostly cauline, basal leaves withering at anthesis;

sheaths usually smooth, sometimes scabridulous, ligules (0.7)1.5-7.3 mm, dorsal surfaces scabrous, apices acute to truncate, erose to lacerate, often ciliolate;

blades 6-20 cm long, 2-5 mm wide, flat, lax to stiff, cauline blades as substantial as 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.

10-25 cm long, 2.5-11 cm wide, broadly ovate, open, bases usually exserted, sometimes enclosed in the upper sheaths at maturity, lowest node with (1)3-11(13) branches;

branches scabridulous, capillary, wide-spreading, branching above midlength, spikelets somewhat aggregated towards the ends of the branches, lower branches 3-7 cm;

pedicels 1-7.3 mm, spreading;

secondary panicles sometimes present in the leaf axils.

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

lanceolate to narrowly ovate, green to tawny.

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, 1.8-3.2 mm, lower glumes longer than the upper glumes.

1-1.5 mm;

endosperm solid.

1.1-1.9 mm;

endosperm liquid.

-veined, veins scabrous, acuminate to acute;

callus hairs to 0.3 mm, abundant;

lemmas 1.3-2.2 mm, smooth or scabridulous, translucent, 5-veined, veins prominent to obscure, apices acute to more or less truncate, entire or minutely denticulate, usually unawned, rarely awned from near midlength, awns to 2 mm, straight, not exserted;

paleas absent, or to 0.1 mm and thin;

anthers 3, 0.4-0.9 mm.

= 42.

= 42.