Elymus bakeri

(E.E. Nelson) Á. Löve
Common names: Baker's wheatgrass
Synonyms: Elymus trachycaulus subsp. bakeri Agropyron bakeri
Treatment appears in FNA Volume 24. Treatment on page 330.

Plants cespitose, not rhizomatous. Culms 30-50 cm tall, 1-2 mm thick, ascending to erect; nodes glabrous. Leaves not basally concentrated; sheaths glabrous; auricles 0.3-0.6 mm; ligules 0.5-1 mm; blades 12-20 cm long, 2-4 mm wide, stiff, abaxial surfaces smooth, glabrous, adaxial surfaces smooth or scabridulous, veins prominent, closely spaced. Spikes 8-12 cm long, 4-6 cm wide including the awns, about 1 cm wide excluding the awns, straight, erect or inclined, with 1 spikelet per node; internodes 5-9 mm long, about 0.8 mm wide, both surfaces glabrous, edges ciliate. Spikelets 10-19 mm long, about twice as long as the adjacent internodes, 4-10 mm wide, appressed, with 4-5 florets; rachillas scabrous or hirtellous; disarticulation above the glumes, beneath each floret. Glumes 7-12 mm long, 1.4-2 mm wide, narrowly oblong, usually green or green tinged with purple, the bases evidently veined or indurate for less than 0.5 mm, 5-veined, veins scabrous, margins narrow, widest distally, apices acute, sometimes bifid, awned, awns 2-8 mm, straight or divergent; lemmas scabrous or smooth, apices often shortly bidentate, awns 10-35 mm, arcuate to recurved; paleas equaling or slightly longer than the lemmas, tapering to the 0.2-0.4 mm wide apices; anthers 0.8-1.5 mm. 2n = 28.

Distribution

Utah, Mont., Oreg., Wash., Wyo., Colo., Idaho, N.Mex.

Discussion

Elymus bakeri grows in high, but not alpine, mountain meadows of Colorado and northern New Mexico. It resembles the awned phase of Pseudoroegneria spicata (p. 281), but differs in having rather thicker culms and spikes, and stouter lemma awns. W.A. Weber (University of Colorado, pers. comm., ca. 1999) stated that it often forms large stands in Colorado.

Reports of Elymus bakeri from Idaho appear to be based on fertile hybrids of E. trachycaulus (p. 321) or E. violaceus (p. 324) with Pseudoroegneria spicata; that for Wallowa County, Oregon, on a specimen of E. glaucus (p. 306).

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.No values specified.

... more about "Elymus bakeri"
membranous +  and scarious +
with hairs +  and scabrous +
scabridulous +  and smooth +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
awned +  and bifid +
bidentate +  and acute +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Mary E. Barkworth +, Julian J.N. Campbell +  and Bjorn Salomon +
(E.E. Nelson) Á. Löve +
1 (?) +  and 3 (?) +
straight +
basal +  and apical +
from the sinus +  and terminal +
not geniculate +
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
keeled +  and rounded +
5-veined +  and veined +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
indurate +
12 cm120 mm <br />0.12 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 /> (0.4 cm4 mm <br />0.004 m <br />) +
spikelike +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
hairy +  and glabrous +
Baker's wheatgrass +
not branching +
sometimes strongly decumbent +  and prostrate +
30 cm300 mm <br />0.3 m <br /> (50 cm500 mm <br />0.5 m <br />) +
ascending +  and erect +
8 cm80 mm <br />0.08 m <br /> (180 cm1,800 mm <br />1.8 m <br />) +
not woody +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Utah +, Mont. +, Oreg. +, Wash. +, Wyo. +, Colo. +, Idaho +  and N.Mex. +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
4 +  and 5 +
laterally compressed +  and terete +
(0)1-7-veined +
green tinged with purple +  and green +
shorter than to longer than the adjacent florets +
7mm +  and 12mm +
subtending +
unequal +, subequal +  and reduced +
1.4mm +  and 2mm +
uncinate +
solid +  and hollow +
1.5 cm15 mm <br />0.015 m <br /> (?) +
5mm +  and 9mm +
0.2 cm2 mm <br />0.002 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (?) +
ciliate +  and scabrous +
distributed +
linear-lanceolate +
stiffly membranous +  and coriaceous +
erose +  and entire +
acute +, rounded +  and truncate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
inconspicuous +
lanceolate +
fleshy +  and membranous +
concealed +  and prominent +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
slightly longer +
tapering +
subequal +
dry +  and fleshy +
spikelike +
hirtellous +  and scabrous +
8 cm80 mm <br />0.08 m <br /> (?) +  and 12 cm120 mm <br />0.12 m <br /> (?) +
subsessile +  and sessile +
bisexual +  and sterile +
terete +  and compressed +
4mm +  and 10mm +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
not papillate +
Elymus trachycaulus subsp. bakeri +  and Agropyron bakeri +
Elymus bakeri +
species +
membranous +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
unequal +
plant +  and cespitose +
aquatic +  and terrestrial +