Flora of North America species comparison

15-95 cm, erect or geniculate at the base, sometimes rooting at the lower nodes;

nodes 3-6.

40-95 cm tall, 2-3.5 mm thick, erect.

glabrous;

ligules 2-6 mm;

blades 3-29 cm long, 3-8 mm wide, adaxial surfaces slightly scabridulous.

glabrous, smooth or scabridulous;

ligules 5-10 mm, rounded or acute, often erose;

blades 5-17 cm long, 4-9 mm wide, smooth or scabridulous over the veins, apices spinose.

8-35 cm, with 6-13 spikelets;

internodes 1-6 cm;

pedicels 1-5.5(9) mm, ascending to spreading.

13-20 cm, with 6-7 spikelets;

lower internodes 3.5-7.2 cm;

upper internodes shorter;

pedicels 2-5(12) mm.

15-60 mm, ascending to spreading, with 7-20(30) florets, lower florets bisexual, upper florets pistillate, terminal florets sterile.

20-40(50) mm, with 7-14 florets, lower florets bisexual, upper florets pistillate, terminal florets usually sterile.

lanceolate to broadly ovate;

lower glumes 1-4.5 mm;

upper glumes 2-6.5 mm, 1-3-veined;

rachilla internodes 1-2.8 mm long, 0.2-0.5 mm thick, with a glandular swelling at the base;

lemmas 4.5-7.5 mm, 7(9)-veined, veins distinct, often prominent, apices truncate or emarginate, unawned or awned, awns to 11 mm;

paleal keels scabridulous, each with a 0.5-2.5 mm triangular, winglike appendage, often denticulate beyond the appendage;

anthers 2.5-4 mm.

lanceolate to ovate, acute, erose;

lower glumes 2-3 mm;

upper glumes 2.5-4.5 mm;

rachilla internodes 2-3 mm long, 0.1-0.2 mm thick, without a glandular swelling at the base;

lemmas 5.5-7 mm, scabridulous, 7-veined, veins prominent, apices truncate, sometimes erose, awned, awns 5-12 mm;

paleal keels awned, awns 3-9 mm, inserted 1/3 – 1/2 of the way from the base;

anthers about 4 mm.

2.5-3.1 mm.

2.5-3 mm.

= unknown.