Bromus scoparius

L.
Common names: Broom brome
Introduced
Treatment appears in FNA Volume 24. Treatment on page 235.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Plants annual. Culms (9) 20-40 cm, erect or ascending. Sheaths sparsely pubescent or glabrous; ligules 0.8-1.5 mm, glabrous or hairy, obtuse; blades 5-20 cm long, 2-5 mm wide, abaxial surfaces glabrous, adaxial surfaces pilose. Panicles 2-7 cm long, 1-4 cm wide, erect, dense, obovoid, wedge-shaped at the base, sometimes interrupted; branches shorter than the spikelets, erect, straight or almost so, sometimes verticillate. Spikelets 12-25 mm, lanceolate, crowded, terete to moderately laterally compressed; florets 5-10, bases concealed at maturity; rachilla internodes concealed at maturity. Glumes scabrous to pubescent; lower glumes 3-4 mm, 3-5-veined; upper glumes 5-7 mm, 5-7-veined; lemmas 7-10 mm long, 1.5-2 mm wide, lanceolate, glabrous, obscurely 7-veined, rounded over the midvein, margins rounded, not inrolled at maturity, apices sharply acute, bifid, teeth shorter than 1 mm; awns 7-10 mm, flattened at the base, divaricate or recurved when mature, arising 1.5 mm or more below the lemma apices; anthers 0.3-0.5 mm. Caryopses shorter than the paleas, thin, weakly inrolled or flat. 2n = 14.

Discussion

Bromus scoparius is native to southern Europe. It grows in waste places. In the Flora region, it has been recorded from Californica and New York.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Bromus scoparius"
membranous +  and scarious +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Leon E. Pavlickf +
divaricate +
3 (?) +  and 0 (?) +
flexuous +  and straight +
distinct +
arising +  and recurved +
subterminal +  and terminal +
flattened +
1.5 cm15 mm <br />0.015 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
not evident +
cross +, linear +  and narrowly lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
verticillate +
almost +  and straight +
spikelike +
Broom brome +
not branching +
ascending +  and erect +
20 cm200 mm <br />0.2 m <br /> (40 cm400 mm <br />0.4 m <br />) +
not woody +
N.Y. +, Calif. +, Mich. +  and Va. +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
5 +  and 10 +
terete +  and laterally compressed +
1-9(11)-veined +
always shorter +  and usually shorter +
lanceolate +
subtending +
scabrous +  and pubescent +
mucronate +  and acute +
unequal +
uncinate +
solid +  and hollow +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
rounded +  and lanceolate +
herbaceous +  and coriaceous +
1.5mm +  and 2mm +
hairy +  and glabrous +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
membranous +
inconspicuous +
lanceolate +
fleshy +  and membranous +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
concealed +  and prominent +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
reduced +
2cm +  and 7cm +
wedge--shaped +  and obovoid +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
dry +  and fleshy +
glabrous +  and pubescent +
converging +  and parallel +
Introduced +
1 +  and 60 +
not viviparous +
terete +  and moderately laterally compressed +
1.2 cm12 mm <br />0.012 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Bromus scoparius +
Bromus sect. Bromus +
species +
membranous +
1 cm10 mm <br />0.01 m <br /> (?) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
aquatic +  and terrestrial +