Flora of North America species comparison

(20)40-150 cm, decumbent, usually rooting at the lower nodes;

nodes pubescent;

internodes glabrous or with papillose-based hairs, hairs to 4.7 mm.

20-150 cm, erect, decumbent, or prostrate.

glabrous or with papillose-based hairs, hairs 0.5-4.7 mm;

ligules of hairs, 0.7-2.2 mm;

blades 3.6-27 cm long, 2-9(14) mm wide, flat, glabrous or pubescent, with or without papillose-based hairs.

open;

ligules of hairs or membranous and ciliate.

(4)6-22 cm long, (1.5)2.5-12 cm wide;

primary branches to 11 cm, ends of the primary branches, secondary branches, and pedicels capillary;

pedicels 0.6-5.3 mm, usually hairy distally, hairs to 6.3 mm.

terminal, simple panicles or panicles of spikelike primary branches, usually with capillary secondary branches and pedicels;

disarticulation below the glumes, sometimes also below the upper florets, the upper florets then falling first.

2-5.7 mm;

calluses hairy, hairs to 4 mm.

with 2 florets.

1.3-1.9 mm long, 0.6-0.9 mm wide.

glumes 0-1.7 mm, pubescent, sometimes with papillose-based hairs, apices rounded, truncate, or slightly cleft;

upper glumes (1.9)2.3-4.9 mm, enclosing the upper florets, gibbous basally, densely pubescent, hairs to 7 mm, sometimes papillose-based, varying from white to rose or darkish purple, apices tapering, beaked, glabrous, unawned or awned, awns to 4.1 mm;

lower florets staminate or sterile;

lower lemmas 1.9-4.8 mm, unawned or with awns to 4.2 mm;

lower paleas 0.9-4 mm;

anthers (0.8)1.5-2.6 mm, orange-brown to orange;

upper lemmas 1.8-2.7 mm, glabrous;

anthers 3, 1.2-1.7 mm, orange-brown to orange.

glumes present or absent, 0-1-veined, unawned;

upper glumes equaling or exceeding the florets, sometimes gibbous basally, 5-7-veined, emarginate to bilobed, awned or unawned;

lower florets staminate or sterile;

lower lemmas similar to the upper glumes, but not gibbous;

upper florets bisexual, laterally compressed;

upper lemmas subcoriaceous, glabrous, smooth, unawned;

upper paleas resembling the upper lemmas;

lodicules 2, fleshy or membranous, x = 9.

= 36.