Bromus porteri

(J.M. Coult.) Nash
Common names: Nodding brome
Synonyms: Bromopsis ported
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 30-100 cm, erect; nodes (2) 3-4 (5), glabrous or pubescent; internodes mostly glabrous, puberulent near the nodes. Sheaths glabrous or pilose, midrib of the culm leaves not abruptly narrowed just below the collar; auricles absent; ligules to 2.5 mm, glabrous, truncate or obtuse, erose or lacerate; blades (3) 10-25 (35) cm long, 2-5 (6) mm wide, flat, not glaucous, both surfaces usually glabrous, sometimes the adaxial surface pilose. Panicles 7-20 cm, open, nodding, often 1-sided; branches slender, ascending to spreading, often recurved and flexuous. Spikelets 12-38 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (3) 5-11 (13) florets. Glumes usually pubescent, rarely glabrous; lower glumes 5-7 (9) mm, usually 3-veined, sometimes 1-veined; upper glumes 6-10 mm, 3-veined, not mucronate; lemmas 8-14 mm, elliptic, rounded over the midvein, usually pubescent or pilose, margins often with longer hairs, backs and margins rarely glabrous, apices acute or obtuse to truncate, entire; awns (1) 2-3 (3.5) mm, straight, arising less than 1.5 mm below the lemma apices; anthers (1) 2-3 mm. 2n = 14.

Distribution

Colo., N.Mex., Wyo., Ariz., Calif., Utah, Nebr., S.Dak., Mont., Idaho, N.Dak., Nev., Tex., Man., Sask.

Discussion

Bromus porteri grows in montane meadows, grassy slopes, mesic steppes, forest edges, and open forest habitats, at 500-3500 m. It is found from British Columbia to Manitoba, and south to California, western Texas, and Mexico. It is closely related to B. anomalus, and has often been included in that species. It differs chiefly in its lack of auricles, and in having culm leaves with midribs that are not narrowed just below the collar.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Bromus porteri"
membranous +  and scarious +
1 cm10 mm <br />0.01 m <br /> (?) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
entire +  and truncate +
Obtuse (?) +  and Acute (?) +
Leon E. Pavlickf +
(J.M. Coult.) Nash +
1 (?) +  and 3 (?) +
1 cm10 mm <br />0.01 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 +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
not evident +
not glaucous +
cross +, linear +  and narrowly lanceolate +
2mm;5mm +
recurved;ascending;spreading +
spikelike +
slender +
Nodding brome +
not branching +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
not woody +
Colo. +, N.Mex. +, Wyo. +, Ariz. +, Calif. +, Utah +, Nebr. +, S.Dak. +, Mont. +, Idaho +, N.Dak. +, Nev. +, Tex. +, Man. +  and Sask. +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
5 +  and 11 +
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 +
puberulent +  and glabrous +
pilose +  and pubescent +
rounded +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
herbaceous +  and coriaceous +
lacerate +, obtuse +  and truncate +
0 cm0 mm <br />0 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
membranous +
inconspicuous +
lanceolate +
fleshy +  and membranous +
1-veined +  and 3-veined +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
5 (?) +  and 2 (?) +
concealed +  and prominent +
pubescent +  and glabrous +
3 +  and 4 +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
reduced +
7 cm70 mm <br />0.07 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 +
1.2 cm12 mm <br />0.012 m <br /> (3.8 cm38 mm <br />0.038 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Bromopsis ported +
Bromus porteri +
Bromus sect. Bromopsis +
species +
membranous +
not mucronate +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
aquatic +  and terrestrial +