familyPoaceae
subfamilyPoaceae subfam. Pooideae
tribePoaceae tribe Triticeae
genusElymus
speciesElymus canadensis
varietyElymus canadensis var. robustus

Elymus canadensis var. robustus

(Scribn. & J.G. Sm.) Mack. & Bush
Mary E. Barkworth, Julian J.N. Campbell, Bjorn Salomon
Endemic
Synonyms: Elymus robustus
Treatment appears in FNA Volume 24. Treatment on page 305.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché, Annaliese Miller

Copyright: Utah State University

Spikes 15-25 (30) cm, moderately nodding, occasionally almost erect, not strongly glaucous, often becoming yellowish or pale reddish-brown; internodes 3-4 mm. Glumes often slightly indurate and bowed out at the base, awns 15-25 mm; lemmas smooth to scabridulous, or occasionally hirsute, awns 30-40 mm, moderately or often strongly outcurving.

Discussion

Elymus canadensis var. robustus occurs mostly in the east-central range of the species, from Illinois and Ohio to Oklahoma and Nebraska, locally becoming the most common variety. Anthesis can be earlier than in other sympatric E. canadensis varieties (Bush 1926). These rather heterogeneous plants tend to be large in most dimensions, and may have resulted from introgression with E. virginicus (p. 298) or E. glabriflorus (p. 296), with which they have often been confused (Davies 1980). Fj hybrids of the other varieties with these species are similar to var. robustus, sometimes with erect spikes that are longer than those of either parent, but they are usually sterile. Spike pubescence may vary considerably, perhaps reflecting different hybrid origins.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Elymus canadensis var. robustus"
RDF feed
2n chromosome quantity
42 +  and 28 +
Abaxial ligule presence
absent +
Abaxial ligule quantity
common +
Abaxial surface architecture or pubescence or relief
smooth +
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
rarely sparsely hispid +  and villous +
Adaxial surface pubescence or relief
with hairs +  and scabrous +
Adaxial surface relief
scabridulous +  and smooth +
Anther quantity
3 +
Anther some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Apex architecture or shape
awned +
Apex pubescence
hairy +
Apex shape
bidentate +  and acute +
Arm cell presence
absent +
Auricle coloration
purplish black +  and brown +
Auricle presence
absent +
Auricle some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Author
Mary E. Barkworth +, Julian J.N. Campbell +  and Bjorn Salomon +
Authority
(Scribn. & J.G. Sm.) Mack. & Bush +
Awn architecture
unbranched +
Awn arrangement
divergent +
Awn arrangement or shape
contorted +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn atypical some measurement
10 cm100 mm <br />0.1 m <br /> (?) +  and 5 cm50 mm <br />0.05 m <br /> (?) +
Awn course
straight +
Awn orientation
outcurving +
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
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 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 size
swelling +
Base texture
hard +
Base width
thick +
Blade arrangement
parallel +
Blade arrangement or course or shape
linear +
Blade coloration
grayish +  and green +
Blade condition
drying +
Blade orientation
Ascending (?) +
Blade prominence
not evident +
Blade reflectance
dull +
Blade shape
cross +, linear +  and narrowly lanceolate +
Blade shape or vernation
involute +
Blade texture
firm +
Blade width
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 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 +
Culm architecture
not branching +
Culm architecture or arrangement or growth form
solitary +
Culm atypical some measurement
40 +
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
decumbent +  and erect +
Culm pubescence
glabrous +
Culm some measurement
60 cm600 mm <br />0.6 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. +, Del. +, D.C. +, Wis. +, W.Va. +, Wyo. +, N.H. +, N.Mex. +, Tex. +, N.C. +, Tenn. +, Pa. +, Alta. +, B.C. +, Man. +, N.B. +, N.W.T. +, Ont. +, Que. +, Sask. +, R.I. +, Nev. +, Va. +, Colo. +, Calif. +, Kans. +, N.Dak. +, Nebr. +, Okla. +, S.Dak. +, Ark. +, Vt. +, Ill. +, Ind. +, Iowa +, Ariz. +, Idaho +, Maine +, Md. +, Mass. +, Ohio +, Utah +, Mo. +, Minn. +, Mich. +, Mont. +, S.C. +, 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 atypical quantity
7 +  and 2 +
Floret length or size
longer +
Floret quantity
3 +  and 5 +
Floret reproduction
bisexual +
Floret shape
laterally compressed +  and terete +
Glume architecture
(0)1-7-veined +
Glume architecture or shape
awned +
Glume height or length or size
shorter than to longer than the adjacent florets +
Glume position
subtending +
Glume presence
absent +
Glume quantity
2 +
Glume shape
bowed +
Glume size
subequal +
Glume some measurement
1.1 cm11 mm <br />0.011 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Glume texture
indurate +
Glume variability
equal +
Hair fixation or orientation
appressed +
Hair quantity
few +
Hair shape
uncinate +
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
1.5 cm15 mm <br />0.015 m <br /> (?) +
Internode length
5mm +  and 10mm +
Internode presence
absent +
Internode pubescence
with a few hairs +  and glabrous +
Internode some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Internode thickness
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.035 cm0.35 mm <br />3.5e-4 m <br />) +
Keel pubescence
ciliate +  and scabrous +
Layer presence
absent +
Leaf arrangement
distributed +
Leaf arrangement or density
concentrated +
Leaf margin arrangement
Overlapping (?) +
Lemma architecture
5(7)-veined +
Lemma architecture or shape
not +  and awned +
Lemma height or length or size
shorter +
Lemma length or size
longer +
Lemma pubescence
hirsute +
Lemma relief
smooth +  and scabridulous +
Lemma shape
linear-lanceolate +
Lemma some measurement
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Lemma texture
stiffly membranous +  and coriaceous +
Ligule architecture
erose +  and entire +
Ligule architecture or shape
truncate +
Ligule atypical some measurement
2 +
Ligule presence
absent +
Ligule pubescence
ciliolate +
Ligule shape
acute +, rounded +  and truncate +
Ligule some measurement
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 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 texture
firm +
Midrib architecture
simple +
Node prominence
concealed +
Node pubescence
glabrous +
Node quantity
1 +, 0 +  and 5 +
Number of lower taxa
0 +
Other quantity
2 +  and 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
bidentate +  and acute +
Palea size
subequal +
Palea some measurement
0.7 cm7 mm <br />0.007 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
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 +
Rachis prominence
evident +
Reference
None +
Sheath architecture
open +
Sheath coloration
Reddish-brown (?) +
Sheath condition
closed +
Sheath length
open +
Sheath pubescence
hirsute +  and glabrous +
Sheath relief
scabridulous +  and smooth +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24 429.xml +
Special status
Endemic +
Spike architecture
ebracteate +
Spike atypical some measurement
30 cm300 mm <br />0.3 m <br /> (?) +
Spike length
6 cm60 mm <br />0.06 m <br /> (?) +  and 30 cm300 mm <br />0.3 m <br /> (?) +
Spike some measurement
15 cm150 mm <br />0.15 m <br /> (25 cm250 mm <br />0.25 m <br />) +
Spikelet architecture
subsessile +  and sessile +
Spikelet arrangement
divergent +
Spikelet atypical quantity
3 (?) +
Spikelet fixation
attached +
Spikelet fusion
distinct +
Spikelet orientation
Patent (Usually appressed) +
Spikelet quantity
2 +
Spikelet reproduction
bisexual +  and sterile +
Spikelet shape
terete +  and compressed +
Spikelet some measurement
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
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 relief
not papillate +
Synonyms
Elymus robustus +
Taxon family
Poaceae +
Taxon name
Elymus canadensis var. robustus +
Taxon parent
Elymus canadensis +
Taxon rank
variety +
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 quantity
1 (?) +
Vein size
unequal +
Volume
Volume 24 +
Whole organism architecture
stoloniferous +  and 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 +
Whole organism pubescence
glaucous +
Whole organism thickness
1mm +  and 2mm +
X chromosome quantity
7 +