Bromus laevipes

Shear
Common names: Chinook brome
Endemic
Treatment appears in FNA Volume 24. Treatment on page 209.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Plants perennial; not rhizomatous. Culms 50-150 cm, erect or basally decumbent, often rooting from the lower nodes; nodes 3-5 (6), pubescent; internodes usually glabrous, often puberulent-pubescent just below the nodes, rarely puberulent throughout. Sheaths glabrous, sometimes slightly pubescent near the throat, sometimes with hairs in the auricular position; auricles absent or vestigial on the basal leaves; ligules 2-4.2 mm, glabrous, obtuse, lacerate; blades 13-26 cm long, 4-10 mm wide, light green or glaucous, flat, glabrous, sometimes scabrous on both surfaces. Panicles 10-20 cm, open, nodding; branches ascending to spreading, often drooping. Spikelets 23-35 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 5-11 florets. Glumes glabrous, sometimes scabrous, margins often bronze-tinged; lower glumes 6-9 mm, 3-veined; upper glumes 8-12 mm, 5-veined; lemmas 12-16 mm, elliptic to lanceolate, rounded over the midvein, backs sparsely pilose, pubescent, or scabrous, margins densely pilose, at least on the lower 1/2, often bronze-tinged, apices acute to obtuse, entire, rarely slightly emarginate, lobes shorter than 1 mm; awns 4-6 mm, straight, arising less than 1.5 mm below the lemma apices; anthers 3.5-5 mm. 2n = 14.

Distribution

Calif., Oreg., Nev., Wash.

Discussion

Bromus laevipes grows from northern Oregon to southern California. It grows in shaded woodlands and on exposed brushy slopes, at 300-1500 m.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Bromus laevipes"
membranous +  and scarious +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
emarginate +  and entire +
Acute (?) +  and Obtuse (?) +
Leon E. Pavlickf +
1 (?) +  and 3 (?) +
straight +
distinct +
subterminal +  and terminal +
geniculate +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
scabrous +, pubescent +  and pilose +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
light green +
13 cm130 mm <br />0.13 m <br /> (26 cm260 mm <br />0.26 m <br />) +
not evident +
glabrous +  and glaucous +
cross +, linear +  and narrowly lanceolate +
4mm;10mm +
drooping;ascending;spreading +
spikelike +
Chinook brome +
decumbent +  and erect +
50 cm500 mm <br />0.5 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
not woody +
Calif. +, Oreg. +, Nev. +  and Wash. +
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 +
mucronate +  and acute +
unequal +
uncinate +
solid +  and hollow +
puberulent +, puberulent-pubescent +  and glabrous +
pubescent +  and glabrous +
rounded +, elliptic +  and lanceolate +
1.2 cm12 mm <br />0.012 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
herbaceous +  and coriaceous +
lacerate +  and obtuse +
0.2 cm2 mm <br />0.002 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
membranous +
inconspicuous +
lanceolate +
fleshy +  and membranous +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
bronze-tinged +
concealed +  and prominent +
3 +  and 5 +
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 +
pubescent +  and glabrous +
1 +  and 60 +
not viviparous +
elliptic +  and lanceolate terete +
2.3 cm23 mm <br />0.023 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Bromus laevipes +
Bromus sect. Bromopsis +
species +
membranous +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
aquatic +  and terrestrial +