Gaudinia fragilis

(L.) P. Beauv.
Common names: Fragile oat
Treatment appears in FNA Volume 24. Treatment on page 732.
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Illustrator: Bee F. Gunn

Copyright: Utah State University

Plants annual; usually tufted. Culms 15-80 (120) cm, erect or ascending; nodes glabrous. Sheaths villous; ligules 0.5-0.7 mm, truncate; blades 1-6.5 cm long, 0.6-4 mm wide, villous. Spikes 6-15 (35) cm. Spikelets 9-20 mm, with 3-6 (8) florets; rachillas straight, proximal segments 2.6-4 mm, distal segments to 1.8 mm. Glumes scabrous over the veins, margins hyaline, apices unawned; lower glumes 3-5 mm; upper glumes 7-11 mm, about twice the length of the lower glumes; calluses glabrous; lemmas (3) 5-8 mm, scabrous on the midveins, awned from above midlength, awns 4.5-15 mm, scabrous, twisted or geniculate; anthers 2-5 mm. Caryopses about 2.5 mm. 2n = 14.

Discussion

Gaudinia fragilis is the most widespread species of the genus in the Mediterranean region. The first record of its presence in the United States dates from a collection made by Karl Zimmer on ballast ground in Mobile, Alabama, in 1885. In 1991, it was discovered in Sonoma County, California, where it was found growing on an open, grassy hilltop in the thin, rocky soil of open oak woodlands, in a region that has long been used for agriculture.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."timesthelengthof" is not declared as a valid unit of measurement for this property.

... more about "Gaudinia fragilis"
membranous +  and scarious +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Thomas F. Daniel +
(L.) P. Beauv. +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
geniculate +
0.45 cm4.5 mm <br />0.0045 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
1 cm10 mm <br />0.01 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
not evident +
cross +, linear +  and narrowly lanceolate +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
spikelike +
Fragile oat +
not branching +
ascending +  and erect +
15 cm150 mm <br />0.15 m <br /> (80 cm800 mm <br />0.8 m <br />) +
not woody +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
3 +  and 6 +
sterile +  and bisexual +
compressed +
reduced +
shorter or longer +
subtending +
unequal +
uncinate +
lanceolate +  and ovate +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
coriaceous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
membranous +
inconspicuous +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
concealed +  and prominent +
2 +  and 1 +
well-developed +
2-keeled +
spikelike +
dry +  and fleshy +
35 cm350 mm <br />0.35 m <br /> (?) +
6 cm60 mm <br />0.06 m <br /> (15 cm150 mm <br />0.15 m <br />) +
1 +  and 60 +
compressed +
0.9 cm9 mm <br />0.009 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Gaudinia fragilis +
Gaudinia +
species +
membranous +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
parallel +  and converging +
stoloniferous +  and rhizomatous +
aquatic +  and terrestrial +