familyPoaceae
subfamilyPoaceae subfam. Pooideae
tribePoaceae tribe Triticeae
genus×elyhordeum
species×elyhordeum schaackianum

×elyhordeum schaackianum

(Bowden) Bowden
Mary E. Barkworth
Treatment appears in FNA Volume 24. Treatment on page 284.
Please click on the illustration for a higher resolution version.
Illustrator: Cindy Roché, Annaliese Miller

Copyright: Utah State University

Culms about 100 cm. Sheaths glabrous, smooth; ligules about 0.7 mm, truncate; blades 6-10 mm wide, flat, adaxial surfaces sparsely hairy, hairs about 0.8 mm. Inflorescences spikelike, 9-11 cm long, 10-12 mm wide, lax, with (2) 3 spikelets per node. Spikelets with 1-2 florets, the second floret, if present, rudimentary, the lateral spikelets shortly pedicellate, the central spikelet sessile or nearly so. Glumes narrow, coarse, unawned or awned, awns to 15 mm; lemmas mostly glabrous, margins shortly hairy distally, apices unawned or awned, awns to 15 (20) mm. 2n = 28.

Distribution

Alaska

Discussion

×Elyhordeum schaackianum consists of hybrids between Elymus hirsutus and Hordeum brachy¬antherum. It is known only from Attu Island, Alaska, and the Queen Charlotte Islands, British Columbia.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "×elyhordeum schaackianum"
RDF feed
2n chromosome quantity
28 +
Abaxial ligule presence
absent +
Abaxial ligule quantity
common +
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
hairy +
Anther quantity
3 +
Apex architecture or shape
awned +
Apex pubescence
hairy +
Apex shape
toothed +, lobed +  and entire +
Arm cell presence
absent +
Auricle presence
absent +
Author
Mary E. Barkworth +
Authority
(Bowden) Bowden +
Awn architecture
unbranched +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn atypical some measurement
20 cm200 mm <br />0.2 m <br /> (?) +
Awn orientation
arising +
Awn position
basal +  and apical +
Awn position or structure subtype
terminal +
Awn quantity
single +
Awn some measurement
0 cm0 mm <br />0 m <br /> (1.5 cm15 mm <br />0.015 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 prominence
not evident +
Blade prominence or shape
flat +
Blade shape
cross +, linear +  and narrowly lanceolate +
Blade width
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Branch shape
spikelike +
Callus pubescence
hairy +  and glabrous +
Central spikelet architecture
nearly +  and sessile +
Culm architecture
not branching +
Culm architecture or arrangement or growth form
solitary +
Culm duration
annual +
Culm growth form
climbing +
Culm growth form or location
floating +
Culm orientation
erect +
Culm some measurement
100 cm1,000 mm <br />1 m <br /> (?) +
Culm texture
not woody +
Distal floret reproduction
sterile +
Distal floret size
reduced +
Distribution
Alaska +
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
1 +  and 2 +
Floret reproduction
bisexual +
Floret shape
laterally compressed +  and terete +
Glume architecture
1-5-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 relief
coarse +
Glume shape
subulate +  and narrowly lanceolate +
Glume size
unequal +
Glume size or width
narrow +
Glume variability
equal +
Hair shape
uncinate +
Hair some measurement
0.8 cm8 mm <br />0.008 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 architecture or arrangement
lax +
Inflorescence length
9 cm90 mm <br />0.09 m <br /> (?) +  and 11 cm110 mm <br />0.11 m <br /> (?) +
Inflorescence position or structure subtype
terminal +
Inflorescence shape
spikelike +
Inflorescence width
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Internode architecture
solid +  and hollow +
Internode presence
absent +
Lateral spikelet architecture
pedicellate +
Layer presence
absent +
Leaf arrangement
distichous +
Leaf margin arrangement
Overlapping (?) +
Lemma architecture
5(7)-veined +
Lemma architecture or shape
awned +
Lemma pubescence
glabrous +
Lemma shape
keeled +, lanceolate +  and rectangular +
Lemma texture
stiffly membranous +  and coriaceous +
Ligule architecture or shape
truncate +
Ligule presence
absent +
Ligule some measurement
0.7 cm7 mm <br />0.007 m <br /> (?) +
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 +
Margin pubescence
hairy +
Midrib architecture
simple +
Node prominence
concealed +  and prominent +
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
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 +
Rachis prominence
evident +
Reference
None +
Sheath architecture
open +
Sheath architecture or pubescence or relief
smooth +
Sheath condition
closed +
Sheath length
full +
Sheath pubescence
glabrous +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V24/V24 409.xml +
Spike architecture
ebracteate +
Spike shape
spikelike +
Spikelet architecture
subsessile +  and sessile +
Spikelet arrangement
mixed +
Spikelet atypical quantity
2 (?) +
Spikelet fixation
attached +
Spikelet fusion
distinct +
Spikelet presence
absent +
Spikelet prominence
rudimentary +
Spikelet quantity
3 +
Spikelet reproduction
bisexual +  and sterile +
Spikelet shape
terete +  and compressed +
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
Gramineae +
Taxon family
Poaceae +
Taxon name
×elyhordeum schaackianum +
Taxon parent
×elyhordeum +
Taxon rank
species +
Terminal floret reproduction
sexual +
Tissue coloration
hyaline +
Tissue texture
membranous +
Vein arrangement
converging +
Vein presence
absent +
Vein prominence
inconspicuous +
Vein quantity
2 (?) +
Vein size
major +
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 +