Gastridium phleoides

(Nees & Meyen) C.E. Hubb.
Common names: Nit grass
Introduced
Treatment appears in FNA Volume 24. Treatment on page 676.

Culms 7-70 cm; nodes 3-5, glabrous, darkened. Sheaths 0.6-10.5 cm, smooth or scabridulous and minutely papillose; ligules 1-7 mm, veined, erose to lacerate, scabridulous and minutely papillose; blades (0.8) 1.5-20 cm long, (0.4) 1.5-6 mm wide, antrorsely scabridulous, glabrous. Panicles (1.1) 2-16.5 cm long, (1.5) 3-37 mm wide; rachises glabrous; branches to 3.4 cm, appressed to ascending, antrorsely scabridulous, pedicels with enlarged apices. Rachilla prolongations 0.3-0.6 mm, densely pubescent. Glumes scabridulous and papillose proximally, scabriduous to scabrous distally, keels scabrous, margins hyaline; lower glumes 3-7 mm; upper glumes 2.7-5.5 mm; lemmas 1-1.5 mm, appressed-pubescent, unawned or awned, awns to 6 mm, twisted; paleas 1-1.3 mm, glabrous; anthers 0.5-0.9 mm, yellow-orange or purple. Caryopses 0.8-1 mm long, 0.4-0.5 mm wide, glabrous. 2n = 14.

Distribution

Maine, Mass., Tex., B.C., Calif., Pacific Islands (Hawaii), Miss., Ariz., Oreg.

Discussion

Native to southwest Asia and northeast Africa, Gastridium phleoides now grows in Australia, South Africa, North America, and South America, in dry, often disturbed areas. In the Flora region, it is established in Oregon and California; it has also been collected, but may not be established, in southwestern British Columbia, Arizona, western Texas (county unknown; US 843557, Texas, 1884, Nealley s.n.), Massachusetts, and South Carolina.

In North America, Gastridium phleoides has been mistakenly placed in G. ventricosum (Gouan) Schinz & Thell. It differs from that species in having densely pubescent lemmas and well-developed, densely pubescent rachilla prolongations.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Gastridium phleoides"
membranous +  and scarious +
purple +  and yellow-orange +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
awned +  and truncate +
J.K. Wipff +
(Nees & Meyen) C.E. Hubb. +
1 (?) +  and 3 (?) +
straight +
shorter or longer +
subterminal +
geniculate +
0 cm0 mm <br />0 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
1.5 cm15 mm <br />0.015 m <br /> (20 cm200 mm <br />0.2 m <br />) +
not evident +
scabridulous +
cross +, linear +  and narrowly lanceolate +
1.5mm;6mm +
appressed;ascending +
scabridulous +
spikelike +
Nit grass +
not branching +
erect +  and decumbent +
7 cm70 mm <br />0.07 m <br /> (70 cm700 mm <br />0.7 m <br />) +
not woody +
Maine +, Mass. +, Tex. +, B.C. +, Calif. +, Pacific Islands (Hawaii) +, Miss. +, Ariz. +  and Oreg. +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
sometimes longer +
compressed +
reduced +
shorter or longer +
subtending +
papillose +  and scabridulous +
gibbous +
unequal +
membranous +  and subcoriaceous +
narrowing +
uncinate +
appressed-pubescent +
lanceolate +  and ovate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
membranous +
lacerate +
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
membranous +
inconspicuous +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
concealed +  and prominent +
3 +  and 5 +
2 +  and 1 +
well-developed +
2-keeled +
subequal +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
2cm +  and 16.5cm +
spikelike +
0.3 cm3 mm <br />0.003 m <br /> (3.7 cm37 mm <br />0.037 m <br />) +
dry +  and fleshy +
papillose +, scabridulous +  and smooth +
0.6 cm6 mm <br />0.006 m <br /> (10.5 cm105 mm <br />0.105 m <br />) +
Introduced +
1 +  and 60 +
not u--shaped +  and compressed +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Gramineae +
Gastridium phleoides +
Gastridium +
species +
membranous +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
parallel +  and converging +
stoloniferous +  and rhizomatous +
aquatic +  and terrestrial +