Briza media

L.
Common names: Perennial quakinggrass Amourette commune Amour du vent
Introduced
Treatment appears in FNA Volume 24. Treatment on page 614.

Plants perennial, shortly rhizomatous. Culms 15-75 cm. Leaves mostly basal; sheaths about 1/2 the length of the internodes, open about 1/2 their length; ligules about 0.5 mm, usually not decurrent, sometimes erose at the apices, truncate; blades 4-16 cm long, blades of the upper leaves shorter than those below, 1.9-3.2 mm wide, glabrous or scabridulous, margins strigose. Panicles 8-20 cm long, to almost as wide; pedicels 5-20 mm. Spikelets 4-5.5 mm, mostly oval, with 3-6 (10) florets. Lower glumes 2.5-3.2 mm; upper glumes 2.5-4 mm; lowermost lemmas 3-4 mm, indistinctly 9-veined or 10-veined, apices broadly obtuse; paleas about 3 mm, V-shaped in cross-section, scarious, margins hyaline and ciliolate; anthers 1.3-2 mm. Caryopses 1.2-1.5 mm, distinctly flattened on 1 side. 2n = 10, 14, 28.

Distribution

Maine, N.H., Del., Md., Mass., N.Y., Calif., Mich., Ala., Conn., Vt., Pa., Colo., Nfld. and Labr. (Labr.), N.S., Ont., R.I.

Discussion

Briza media is native to chalk and clay grasslands of Europe. It grows in acid to calcareous soils in moist to somewhat dry, sunny conditions, in meadow floodplains, forest clearings, old meadows, and pastures. It is often grown as an ornamental, and can colonize artificial habitats such as roadsides, but does not appear to invade recently disturbed locations. In the Flora region, it is most abundant in eastern North America, and is found in a few widely scattered locations elsewhere.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."open" is not a number.

... more about "Briza media"
28 +, 14 +  and 10 +
membranous +  and scarious +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Neil Snow +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
4 cm40 mm <br />0.04 m <br /> (16 cm160 mm <br />0.16 m <br />) +
not evident +
scabridulous +
cross +, linear +  and narrowly lanceolate +
1.9mm;3.2mm +
capillary +
Perennial quakinggrass +, Amourette commune +  and Amour du vent +
15 cm150 mm <br />0.15 m <br /> (75 cm750 mm <br />0.75 m <br />) +
not woody +
Maine +, N.H. +, Del. +, Md. +, Mass. +, N.Y. +, Calif. +, Mich. +, Ala. +, Conn. +, Vt. +, Pa. +, Colo. +, Nfld. and Labr. (Labr.) +, N.S. +, Ont. +  and R.I. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
3 +  and 6 +
sterile +  and bisexual +
compressed +
reduced +
shorter than to longer than the adjacent lemmas +
shorter or longer +
subtending +
cordate +  and naviculate +
subequal +
uncinate +
Round (?) +  and Elliptic (?) +
1-7(9)-veined +
long +  and longer +
inflated +
decurrent +
0.5 cm5 mm <br />0.005 m <br /> (?) +
free +  and joined +
inconspicuous +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
perpendicular +
ciliolate +  and strigose +
concealed +  and prominent +
2 +  and 1 +
well-developed +
v--shaped +
3 cm30 mm <br />0.03 m <br /> (?) +
8cm +  and 20cm +
spikelike +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
dry +  and fleshy +
not prolonged +
Introduced +
1 +  and 60 +
0.4 cm4 mm <br />0.004 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Briza media +
species +
membranous +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
parallel +  and converging +
aquatic +  and terrestrial +