Bromus anomalus

Rupr. ex E. Fourn.
Common names: Mexican brome
Treatment appears in FNA Volume 24. Treatment on page 213.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Plants perennial; not rhizomatous. Culms 40-90 cm, erect; nodes (3) 4-7 (8), these and the internodes pubescent or glabrous. Sheaths glabrous or pilose, midrib of the culm leaves abruptly narrowed just below the collar; auricles often present on the lower leaves; ligules to 1 mm, truncate; blades 14-22 (26) cm long, to 6 mm wide, flat, glabrous or pilose, not glaucous. Panicles 10-20 cm, open, nodding; branches ascending or spreading. Spikelets (14) 15-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 4-12 florets. Glumes usually pubescent, rarely glabrous; lower glumes 5-6 mm, 1-3-veined; upper glumes 6-8 mm, 3-veined, sometimes mucronate; lemmas 7-10 mm, elliptic to lanceolate, rounded over the midvein, backs and margins pubescent, apices acute to obtuse, entire; awns 1-3 (5) mm, straight, arising less than 1.5 mm below the lemma apices; anthers 2-4 mm. 2n = 14.

Distribution

Alta., B.C., Sask., N.Mex., Tex.

Discussion

Bromus anomalus grows on rocky slopes in western Texas and adjacent Mexico. Many records of this species in the Flora region are here treated as B. porteri, a closely related species that has sometimes been included in B. anomalus. The main difference is that B. anomalus has auricles, and culm leaves with midribs that are narrowed just below the collar.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Bromus anomalus"
membranous +  and scarious +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Acute (?) +  and Obtuse (?) +
Leon E. Pavlickf +
Rupr. ex E. Fourn. +
1 (?) +  and 3 (?) +
5 cm50 mm <br />0.05 m <br /> (?) +
straight +
distinct +
subterminal +  and terminal +
geniculate +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
14 cm140 mm <br />0.14 m <br /> (22 cm220 mm <br />0.22 m <br />) +
not evident +
not glaucous +, pilose +  and glabrous +
cross +, linear +  and narrowly lanceolate +
0mm;6mm +
spreading;ascending +
spikelike +
Mexican brome +
not branching +
40 cm400 mm <br />0.4 m <br /> (90 cm900 mm <br />0.9 m <br />) +
not woody +
Alta. +, B.C. +, Sask. +, N.Mex. +  and Tex. +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
4 +  and 12 +
terete +  and laterally compressed +
1-9(11)-veined +
always shorter +  and usually shorter +
lanceolate +
subtending +
glabrous +  and pubescent +
mucronate +  and acute +
unequal +
uncinate +
solid +  and hollow +
glabrous +  and pubescent +
pubescent +  and glabrous +
rounded +, elliptic +  and lanceolate +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
herbaceous +  and coriaceous +
lacerate +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
inconspicuous +
lanceolate +
fleshy +  and membranous +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
8 (?) +  and 3 (?) +
concealed +  and prominent +
4 +  and 7 +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
reduced +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
dry +  and fleshy +
pilose +  and glabrous +
1 +  and 60 +
not viviparous +
elliptic +  and lanceolate terete +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Bromus anomalus +
Bromus sect. Bromopsis +
species +
membranous +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
aquatic +  and terrestrial +