Eremopyrum triticeum

(Gaertn.) Nevski
Common names: Annual wheatgrass
Introduced
Synonyms: Agropyron triticeum Agropyron prostratum
Treatment appears in FNA Volume 24. Treatment on page 254.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché

Copyright: Utah State University

Culms to 30 cm, mostly glab¬rous, puberulent below the spikes. Sheaths of upper leaves inflated; blades 1-3 (6) mm wide, scabrous or shortly pilose distally. Spikes 1.3-2.4 cm long, 0.8-2 cm wide, elliptic, ovate, or nearly circular in outline; disarticulation beneath each floret, sometimes at the base of the spikes, not in the rachises. Spikelets 6-12 mm, with 2-3 florets. Glumes 4-7.5 mm, glabrous, 1-veined and keeled, becoming 2-keeled by the development of a ridge adjacent to the vein, bases prominently inflated and curved; lemmas 5-7.5 mm, prominently keeled towards the subulate apices, lowest lemma in each spikelet pubescent on the proximal 1/2, hairs 0.1-0.15 mm, glabrous distally, the other lemmas glabrous; palea keels not prolonged. 2n = 14.

Distribution

Colo., N.Mex., Wash., N.Y., Utah, Wyo., Nebr., Oreg., Mont., Alta., B.C., Man., Sask., Idaho, Ariz., Nev.

Discussion

Eremopyrum triticeum is known primarily from scattered disturbed sites in western North America, from southern Canada to Arizona and New Mexico. Like most weeds, it is probably more widely distributed than herbarium records indicate. It is tolerant of alkaline soils, and is summer-dormant.

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 "Eremopyrum triticeum"
membranous +  and scarious +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
subulate +
Signe Frederiksen +
(Gaertn.) Nevski +
1 (?) +  and 3 (?) +
straight +
basal +  and apical +
keeled +  and rounded +
pseudopetiolate +  and branching +
connate +
intravaginal +, extravaginal +, branching +  and basal +
inflated +
swelling +
not evident +
pilose +  and scabrous +
cross +, linear +  and narrowly lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
spikelike +
hairy +  and glabrous +
Annual wheatgrass +
not branching +
puberulent +
geniculate +
0 cm0 mm <br />0 m <br /> (30 cm300 mm <br />0.3 m <br />) +
not woody +
Colo. +, N.Mex. +, Wash. +, N.Y. +, Utah +, Wyo. +, Nebr. +, Oreg. +, Mont. +, Alta. +, B.C. +, Man. +, Sask. +, Idaho +, Ariz. +  and Nev. +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
2 +  and 3 +
sterile +  and bisexual +
laterally compressed +  and terete +
shorter than to longer than the adjacent florets +
subtending +
2-keeled +  and keeled +
unequal +
0.4 cm4 mm <br />0.004 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
indurate +  and coriaceous +
uncinate +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.015 cm0.15 mm <br />1.5e-4 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
solid +  and hollow +
hairy +  and glabrous +
0.5 cm5 mm <br />0.005 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
coriaceous +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
membranous +
inconspicuous +
lanceolate +
fleshy +  and membranous +
with hairs +  and glabrous +
concealed +  and prominent +
2 +  and 1 +
well-developed +
slightly longer +
scabrous +  and ciliate +
2-keeled +
subequal +
usually shorter and thinner +
dry +  and fleshy +
spikelike +
inflated +
Introduced +
1.3 cm13 mm <br />0.013 m <br /> (?) +  and 2.4 cm24 mm <br />0.024 m <br /> (?) +
circular +, ovate +  and elliptic +
subsessile +  and sessile +
bisexual +  and sterile +
compressed +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
not papillate +
Agropyron triticeum +  and Agropyron prostratum +
Eremopyrum triticeum +
Eremopyrum +
species +
membranous +
inconspicuous +
aquatic +  and terrestrial +