Flora of North America species comparison

15-60 cm, erect, usually not branching from the upper nodes;

nodes 3-4.

50-100 cm, erect to somewhat decumbent, not rooting at the lower nodes, usually branching at the aerial nodes.

glabrous or sparsely pubescent;

ligules 0.6-2.5 mm;

blades 1.5-9 cm long, 3-5 mm wide, glabrous, with papillose-based hairs basally.

grayish-villous;

ligules 1.5-2 mm;

blades to 12 cm long, 2-2.2 mm wide, flat or folded, densely grayish-villous on both surfaces.

with 2-7 spikelike primary branches in 1-2 verticils;

primary branches 3-12 cm, erect to ascending, axes 0.6-1 mm wide, wing-margined, wings at least 1/2 as wide as the midribs, lower and middle portions of the branches bearing spikelets in groups of 3(4, 5);

secondary branches rarely present;

axillary inflorescences absent.

with 2-3 spikelike primary branches, secondary branches not present;

primary branches 5-11 cm, axes not winged, without spikelets or with widely spaced abortive spikelets on the proximal 1-1.5 cm, bearing spikelets in unequally pedicellate pairs at midlength;

shorter pedicels about 2 mm;

longer pedicels about 3 mm, not adnate to the branch axes.

1.2-1.7 mm, homomorphic, narrowly elliptic.

2.7-3.2 mm, appressed, glabrous.

absent or a veinless, membranous rim;

upper glumes 1.2-1.4 mm, 1/2 as long as to almost equaling the upper lemmas, 3-veined, appressed-pubescent, hairs minutely verrucose;

lower lemmas 1.2-1.7 mm, 5-7-veined, veins equally spaced, region between the 2 inner lateral veins and the margins appressed-pubescent, hairs 0.3-0.5 mm, smooth or minutely verrucose (use 50x magnification), verrucose hairs most abundant near the lemma bases;

upper lemmas light brown when immature, dark brown at maturity;

anthers 0.4-0.6 mm.

minute, rounded, erose;

upper glumes slightly shorter than the spikelets, 3-veined, glabrous;

lower lemmas 7-veined, glabrous;

upper lemmas gray or yellow when immature, becoming purple at maturity.

= 36.

= unknown.