familyPoaceae
subfamilyPoaceae subfam. Pooideae
tribePoaceae tribe Triticeae
genusElymus
speciesElymus trachycaulus
subspeciesElymus trachycaulus subsp. trachycaulus

Elymus trachycaulus subsp. trachycaulus

Mary E. Barkworth, Julian J.N. Campbell, Bjorn Salomon
Common names: Slender wheatgrass Élyme à chaumes rudes Agropyre à chaumes rudes
Synonyms: Agropyron trachycaulum var. novae-angliae Elymus trachycaulus subsp. teslinensis Elymus trachycaulus subsp. novae-angliae Elymus trachycaulus subsp. major Agropyron trachycaulum var. typicum Agropyron trachycaulum var. pilosiglume Agropyron trachycaulum var. majus Agropyron teslinense Agropyron tenerum Agropyron pauciflorum Agropyron caninum var. tenerum Agropyron caninum var. majus Agropyron caninum subsp. majus Agropyron caninum var. bornemannii
Treatment appears in FNA Volume 24. Treatment on page 322.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché, Annaliese Miller

Copyright: Utah State University

Culms 30-150 cm. Spikes (4) 8-30 cm long, 0.5-0.8 cm wide, 2-sided; internodes 8-15 mm. Spikelets with 3-9 florets, the bases usually visible. Glumes 5-17 mm, at least 1 vein scabrous to near the base, sometimes all veins scabrous, unawned or with straight awns shorter than 2 mm; lemmas unawned or awned, awns to 5 mm, straight.

Discussion

Elymus trachycaulus subsp. trachycaulus grows throughout the habitat and range of the species, and exhibits considerably more variation than subsp. subsecundus. Two aspects of the variation that seem particularly worthy of further study are the glume venation and the spacing of spikelets in the spikes. Plants with glumes having 5-7 well-developed, narrowly spaced veins are restricted to lower elevations and the southern portion of the subspecies range; northern plants and plants at higher elevations generally have 3-5 weakly developed and widely spaced veins. The former glumes resemble those of E. glaucus, with which E. trachycaulus subsp. trachycaulus is often sympatric; the latter, those of E. violaceus (p. 324). Spikelet spacing also varies considerably. In at least some instances, plants with widely spaced spikelets appear to be associated with more shady habitats.

Selected References

None.

Lower Taxa

None.

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

... more about "Elymus trachycaulus subsp. trachycaulus"
RDF feed
2n chromosome quantity
28 +
Abaxial ligule presence
absent +
Abaxial ligule quantity
common +
Abaxial surface architecture or pubescence or relief
smooth +
Abaxial surface pubescence
hairy +  and glabrous +
Abaxial surface pubescence or relief
scabrous +
Adaxial cell presence
absent +
Adaxial cell shape
bulliform +
Adaxial ligule architecture or pubescence or shape
ciliate +
Adaxial ligule presence
absent +
Adaxial ligule texture
membranous +  and scarious +
Adaxial surface pubescence
glabrous +  and hairy +
Adaxial surface pubescence or relief
with hairs +  and scabrous +
Anther atypical some measurement
0.8 cm8 mm <br />0.008 m <br /> (?) +
Anther quantity
3 +
Anther some measurement
0.12 cm1.2 mm <br />0.0012 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Apex architecture or shape
truncate +  and awned +
Apex pubescence
hairy +
Apex shape
acute +  and awned +
Apex width
0.15mm;0.3mm +
Arm cell presence
absent +
Auricle presence
absent +
Auricle quantity
0-1 mm +
Author
Mary E. Barkworth +, Julian J.N. Campbell +  and Bjorn Salomon +
Authority
(Link) Gould +
Awn architecture
unbranched +
Awn arrangement
divergent +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn course
straight +
Awn orientation
arising +
Awn position
basal +  and apical +
Awn position or structure subtype
from the sinus +  and terminal +
Awn quantity
single +
Awn shape
not geniculate +
Awn some measurement
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Back shape
keeled +  and rounded +
Basal floret quantity
1 +  and 2 +
Base architecture
pseudopetiolate +  and branching +
Base arrangement
close +
Base fusion
free +
Base position
intravaginal +, extravaginal +, branching +  and basal +
Base prominence
visible +
Base size
swelling +
Base texture
hard +
Base width
thick +
Blade arrangement
parallel +
Blade arrangement or course or shape
linear +
Blade course
straight +
Blade orientation
Ascending (?) +
Blade prominence
not evident +
Blade shape
flat +  and involute +
Blade width
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Branch shape
spikelike +
Bristle some measurement
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Callus pubescence
hairy +  and glabrous +
Common name
Slender wheatgrass +, Élyme à chaumes rudes +  and Agropyre à chaumes rudes +
Culm architecture
not branching +
Culm architecture or arrangement or growth form
solitary +
Culm atypical some measurement
220 +
Culm duration
annual +
Culm growth form
climbing +
Culm growth form or location
floating +
Culm growth form or orientation
sometimes strongly decumbent +  and prostrate +
Culm orientation
ascending +  and erect +
Culm pubescence
glabrous +
Culm some measurement
30 cm300 mm <br />0.3 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
Culm texture
not woody +
Distal floret reproduction
sterile +
Distal floret size
reduced +
Distribution
Conn. +, N.J. +, N.Y. +, Wash. +, Wis. +, Alta. +, B.C. +, Greenland +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, N.W.T. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, W.Va. +, Wyo. +, N.H. +, N.Mex. +, Tex. +, N.C. +, N.Dak. +, Pa. +, Calif. +, Nev. +, Va. +, Colo. +, Alaska +, Nebr. +, S.Dak. +, Vt. +, Ill. +, Ind. +, Iowa +, Ariz. +, Idaho +, Maine +, Md. +, Mass. +, Ohio +, Utah +, Mo. +, Minn. +, Mich. +, R.I. +, Kans. +, Mont. +, Ky. +  and Oreg. +
Embryo quantity
1/3 +
Endosperm texture
liquid +, soft +  and hard +
Filament shape
capillary +
Floret architecture
pistillate +  and staminate +
Floret arrangement
adjacent +
Floret length or size
longer +
Floret quantity
3 +  and 9 +
Floret reproduction
bisexual +
Floret shape
laterally compressed +  and terete +
Glume architecture
3-7-veined +
Glume architecture or shape
awned +
Glume coloration
green +
Glume coloration or density
purple +
Glume height or length or size
shorter than to longer than the adjacent florets +
Glume length
keeled +, flat +, 5mm +  and 17mm +
Glume position
midlength +
Glume presence
absent +
Glume quantity
1 +
Glume shape
lanceolate +  and narrowly ovate +
Glume size
subequal +
Glume some measurement
0.5 cm5 mm <br />0.005 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
Glume variability
equal +
Glume width
widest +
Hair shape
uncinate +
Hair some measurement
0 cm0 mm <br />0 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Hilum arrangement or course or shape
linear +
Hilum coloration or relief
punctate +
Hilum shape
Ovate (?) +
Illustration
Present +
Illustration copyright
Utah State University +
Illustrator
Cindy Roché +  and Annaliese Miller +
Inflorescence architecture
compound +
Inflorescence position or structure subtype
terminal +
Internode architecture
solid +  and hollow +
Internode atypical some measurement
4 cm40 mm <br />0.04 m <br /> (?) +
Internode presence
absent +
Internode some measurement
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Keel pubescence
ciliate +  and scabrous +
Keel shape
tapering +
Layer presence
absent +
Leaf arrangement
distributed +
Leaf arrangement or density
concentrated +
Leaf margin arrangement
Overlapping (?) +
Lemma architecture
5(7)-veined +
Lemma architecture or pubescence or relief
smooth +
Lemma architecture or shape
awned +
Lemma arrangement
adjacent +
Lemma height or length or size
shorter +
Lemma length or size
longer +
Lemma pubescence
glabrous +
Lemma quantity
3/4 +
Lemma relief
scabridulous +
Lemma shape
linear-lanceolate +
Lemma some measurement
0.6 cm6 mm <br />0.006 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
Lemma texture
stiffly membranous +  and coriaceous +
Lemma width
1.8mm +  and 2.3mm +
Ligule architecture
erose +  and entire +
Ligule architecture or shape
truncate +
Ligule presence
absent +
Ligule pubescence
ciliolate +
Ligule shape
acute +, rounded +  and truncate +
Ligule some measurement
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Ligule texture
membranous +
Lodicule architecture
veined +
Lodicule architecture or pubescence or shape
ciliate +
Lodicule architecture or shape
truncate +
Lodicule prominence
inconspicuous +
Lodicule quantity
2 +
Lodicule shape
lanceolate +
Lodicule texture
fleshy +  and membranous +
Lowest floret architecture or shape
glumelike +
Lowest floret function
functional +
Lowest floret reproduction
sterile +
Margin coloration
hyaline +
Margin texture
scarious +
Margin variability
equal +
Margin width
widest;0.2mm;0.5mm +
Midrib architecture
simple +
Node prominence
concealed +  and prominent +
Node pubescence
glabrous +
Number of lower taxa
0 +
Other quantity
1 +
Ovary presence
absent +
Ovary pubescence
hairy +  and glabrous +
Palea development
well-developed +
Palea height or length or size
shorter +
Palea length or size
slightly longer +
Palea presence
absent +
Palea shape
keeled +
Palea size
subequal +
Papilla presence
absent +
Pedicel presence
absent +
Pedicel quantity
0-4 mm +
Pericarp arrangement
separating +
Pericarp condition or texture
dry +
Pericarp texture
dry +  and fleshy +
Pericarp width
thin +
Pseudopetiole presence
absent +
Raceme shape
spikelike +
Rachilla length
prolonged +
Rachilla pubescence
hairy +  and glabrous +
Rachis prominence
evident +
Reference
None +
Sheath architecture
open +
Sheath condition
closed +
Sheath length
open +
Sheath pubescence
villous +, hirsute +  and glabrous +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24 453.xml +
Spike architecture
ebracteate +
Spike length
8 cm80 mm <br />0.08 m <br /> (?) +  and 30 cm300 mm <br />0.3 m <br /> (?) +
Spikelet architecture
subsessile +  and sessile +
Spikelet arrangement
divergent +
Spikelet atypical quantity
5 (?) +
Spikelet fixation
attached +
Spikelet fixation or orientation
appressed +
Spikelet fusion
distinct +
Spikelet orientation
Patent (Usually appressed) +
Spikelet quantity
1 +
Spikelet reproduction
bisexual +  and sterile +
Spikelet shape
terete +  and compressed +
Spikelet width
3mm +  and 6mm +
Stamen quantity
1 +  and 3 +
Starch-grain architecture
simple +  and compound +
Style-branch atypical quantity
4 +  and 1 +
Style-branch quantity
2 (?) +  and 3 (?) +
Style quantity
2 +
Subsidiary-cell architecture
parallel-sided +
Surface architecture or pubescence or relief
smooth +
Surface pubescence
glabrous +
Surface relief
not papillate +
Synonyms
Agropyron trachycaulum var. novae-angliae +, Elymus trachycaulus subsp. teslinensis +, Elymus trachycaulus subsp. novae-angliae +, Elymus trachycaulus subsp. major +, Agropyron trachycaulum var. typicum +, Agropyron trachycaulum var. pilosiglume +, Agropyron trachycaulum var. majus +, Agropyron teslinense +, Agropyron tenerum +, Agropyron pauciflorum +, Agropyron caninum var. tenerum +, Agropyron caninum var. majus +, Agropyron caninum subsp. majus +  and Agropyron caninum var. bornemannii +
Taxon family
Poaceae +
Taxon name
Elymus trachycaulus subsp. trachycaulus +
Taxon parent
Elymus trachycaulus +
Taxon rank
subspecies +
Terminal floret reproduction
sexual +
Tissue coloration
hyaline +
Tissue texture
membranous +
Tooth some measurement
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
Vein architecture or shape
ribbed +
Vein arrangement
spaced +
Vein presence
absent +
Vein prominence
inconspicuous +
Vein pubescence or relief
scabrous +
Vein quantity
1 (?) +
Vein size
unequal +
Volume
Volume 24 +
Whole organism architecture
rhizomatous +
Whole organism arrangement or pubescence
tufted +
Whole organism duration
perennial +
Whole organism growth form
plant +  and cespitose +
Whole organism growth form or habitat
aquatic +  and terrestrial +
X chromosome quantity
7 +