Elymus pringlei

Scribn. & Merr.
Common names: Mexican wildrye
Treatment appears in FNA Volume 24. Treatment on page 312.

Plants cespitose, not rhizomatous, usually somewhat glaucous. Culms 50-110 cm, erect or somewhat geniculate at the base; nodes 6-9, mostly exposed, glabrous. Leaves evenly distributed; sheaths usually glabrous, occasionally pilose, hairs somewhat retrorse; auricles about 1 mm, pale or brownish; ligules about 1 mm, erase; blades 3-12 mm wide, lax, adaxial surfaces sparsely scabridulous, sometimes hispidulous to pilose on the veins, usually glaucous. Spikes 4-12 cm long, 2-3 cm wide, erect, the bases sometimes sheathed, with 2 spikelets per node; internodes 3-6 mm, about 0.2 mm thick at the thinnest sections, with 2 hispid dorsal angles, without green lateral bands. Spikelets 10-15 mm excluding the awns, 18-30 mm including the awns, appressed, with 3-5 (6) florets, lowest florets functional; disarticulation above the glumes, beneath each floret. Glumes subequal, 12-22 mm long including the undifferentiated awns, 0.2-0.3 (0.6) mm wide, setaceous, entire, 0-1 (2) -veined, tapering from the base, glabrous, margins firm, awns more or less straight; lemmas 8-10 mm, usually scabrous-hispid or thinly strigose, at least distally, awns 8-22 mm, straight or flexuous; paleas 7-8 mm, obtuse, often emarginate; anthers 2.5-4 mm. Anthesis May to June. 2n = unknown.

Discussion

Elymus pringlei grows on moist slopes and canyons, in pine and deciduous tree woods, at 1500-2300 m in the Sierra Madre Orientale of eastern Mexico. This poorly known species is similar to E. texensis (see next) and E. interruptus (p. 306). It is included here because it seems likely that it also grows in southern Texas, having been collected in Coahuila, Mexico, 54 miles from the border, near Big Bend National Park (Campbell 2002).

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Elymus pringlei"
membranous +  and scarious +
glaucous +, hispidulous +  and pilose +
with hairs +  and scabrous +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
bidentate +  and acute +
brownish +  and pale +
1 cm10 mm <br />0.01 m <br /> (?) +
Mary E. Barkworth +, Julian J.N. Campbell +  and Bjorn Salomon +
Scribn. & Merr. +
1 (?) +  and 3 (?) +
flexuous +  and straight +
basal +  and apical +
from the sinus +  and terminal +
undifferentiated +
not geniculate +
0.8 cm8 mm <br />0.008 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
keeled +  and rounded +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
not evident +
cross +, linear +  and narrowly lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
spikelike +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
hairy +  and glabrous +
Mexican wildrye +
not branching +
sometimes strongly decumbent +  and prostrate +
geniculate +
50 cm500 mm <br />0.5 m <br /> (110 cm1,100 mm <br />1.1 m <br />) +
not woody +
Idaho +, Mont. +, Nebr. +, N.C. +, Conn. +, N.J. +, N.Y. +, Mass. +, Wash. +, Va. +, W.Va. +, Ark. +, Iowa +, Kans. +, Mo. +, N.Dak. +, Okla. +, S.Dak. +, Ariz. +, D.C +, Ga. +, Ill. +, Ky. +, Mich. +, N.Mex. +, Pa. +, S.C. +, Tenn. +, Wyo. +, Del. +, Miss. +, Ind. +, Oreg. +, Maine +, N.H. +, R.I. +, Vt. +, Ala. +, Fla. +, La. +, Md. +, N.S. +, Ohio +, Tex. +, Wis. +, Colo. +, Calif. +, Alaska +, Utah +, Nev. +, Alta. +, B.C. +, Greenland +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +  and Minn. +
liquid +, soft +  and hard +
capillary +
pistillate +  and staminate +
3 +  and 5 +
laterally compressed +  and terete +
0-1(2)-veined +
shorter than to longer than the adjacent florets +
12mm +  and 22mm +
subtending +
tapering +  and setaceous +
subequal +
0.2mm +  and 0.3mm +
uncinate +
solid +  and hollow +
1.5 cm15 mm <br />0.015 m <br /> (?) +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (?) +
ciliate +  and scabrous +
distributed +
strigose +  and scabrous-hispid +
linear-lanceolate +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
stiffly membranous +  and coriaceous +
erose +  and entire +
acute +, rounded +  and truncate +
1 cm10 mm <br />0.01 m <br /> (?) +
membranous +
inconspicuous +
lanceolate +
fleshy +  and membranous +
6 +  and 9 +
2 +  and 1 +
hairy +  and glabrous +
well-developed +
slightly longer +
subequal +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
dry +  and fleshy +
spikelike +
pilose +  and glabrous +
4 cm40 mm <br />0.04 m <br /> (?) +  and 12 cm120 mm <br />0.12 m <br /> (?) +
subsessile +  and sessile +
bisexual +  and sterile +
terete +  and compressed +
1.8 cm18 mm <br />0.018 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
not papillate +
Gramineae +
Elymus pringlei +
species +
membranous +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
inconspicuous +
unequal +
plant +  and cespitose +
aquatic +  and terrestrial +