familyPoaceae
subfamilyPoaceae subfam. Danthonioideae
tribePoaceae tribe Danthonieae
genusSchismus
speciesSchismus arabicus

Schismus arabicus

Nees
Elizabeth A. Kellogg
Common names: Arabian schismus
Introduced
Treatment appears in FNA Volume 25. Treatment on page 307.
Please click on the illustration for a higher resolution version.
Illustrator: Hana Pazdírková, Linda A. Vorobik

Copyright: Utah State University

Plants annual. Culms (2) 6-16 cm. Ligules 0.5-1.5 mm, of hairs; blades 4-6 cm long, 0.5-2 mm wide, abaxial surfaces glabrous or sparsely pubescent, adaxial surfaces sparsely to densely pubescent. Panicles (1) 2-3.5 cm. Spikelets 5-7 mm. Lower glumes 4.2-6.2 mm, equaling or exceeding the distal florets; upper glumes 4-6 mm; lemmas 1.8-2.6 mm, with dense, spreading pubescence between the veins, lobes longer than wide, acute to acuminate; paleas 1.5-2.2 mm, shorter than the lemmas; anthers 0.2-0.5 mm. Caryopses 0.5-0.8 mm. 2n = 12.

Distribution

Utah, Calif., Ariz., N.Mex., Nev.

Discussion

Schismus arabicus is native to southwestern Asia, but it is now established in the southwestern United States, growing in open and disturbed sites.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Schismus arabicus"
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2n chromosome quantity
12 +
Abaxial ligule presence
absent +
Abaxial ligule quantity
common +
Abaxial surface pubescence
pubescent +  and glabrous +
Adaxial cell presence
absent +
Adaxial cell quantity
Not (?) +
Adaxial cell shape
bulliform +
Adaxial ligule architecture or pubescence or shape
ciliate +
Adaxial ligule presence
absent +
Adaxial ligule texture
membranous +
Adaxial surface pubescence
pubescent +
Anther quantity
3 +
Anther some measurement
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Apex shape
notched +  and bifid +
Apical flap texture
membranous +
Arm cell anatomy
kranz +
Arm cell presence
absent +
Auricle presence
absent +
Author
Elizabeth A. Kellogg +
Authority
Nees +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn orientation
arising +
Awn quantity
1 +
Awn shape
geniculate +
Back shape
keeled +  and rounded +
Basal segment architecture
twisted +
Basal segment prominence or shape
flat +
Base architecture
pseudopetiolate +  and branching +
Base arrangement
separated +
Base position
intravaginal +, extravaginal +, branching +  and basal +
Base size
swelling +
Base texture
hard +
Base width
thick +
Blade architecture
not pseudopetiolate +
Blade architecture or arrangement
non-radiate +
Blade length
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Blade position
adaxial +
Blade shape
folded +  and flat +
Blade shape or vernation
involute +
Blade width
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Branch condition
later +
Branch quantity
1;2 +
Branch shape
spikelike +
Caryopsis arrangement
separate +
Caryopsis shape
ovoid +
Caryopsis some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Common name
Arabian schismus +
Culm architecture
hollow +  and solid +
Culm architecture or arrangement or growth form
solitary +
Culm atypical some measurement
2 +
Culm duration
perennial +  and annual +
Culm growth form
climbing +
Culm growth form or location
floating +
Culm growth form or orientation
decumbent +
Culm orientation
ascending +  and erect +
Culm pubescence
glabrous +
Culm some measurement
6 cm60 mm <br />0.06 m <br /> (16 cm160 mm <br />0.16 m <br />) +
Culm texture
woody +  and herbaceous +
Distal cell length or size
long +
Distal cell size or width
narrow +
Distal floret architecture
staminate +
Distribution
Utah +, Calif. +, Ariz. +, N.Mex. +  and Nev. +
Embryo size
small +  and large +
Endosperm texture
hard +
Filament shape
capillary +
Floret architecture
pistillate +
Floret atypical quantity
10 +  and 4 +
Floret length or size
sometimes longer +
Floret quantity
5 +  and 7 +
Floret reproduction
bisexual +
Floret shape
compressed +
Fusoid cell presence
absent +
Glume architecture
3-7-veined +
Glume architecture or shape
awned +
Glume position
subtending +
Glume position relational
exceeded by the distal floret +  and exceeding +
Glume quantity
2 +
Glume size
subequal +
Glume variability
equal +
Hair shape
non-uncinate +
Hair some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Hilum arrangement or course or shape
long-linear +
Hilum coloration or relief
punctate +
Illustration
Present +
Illustration copyright
Utah State University +
Illustrator
Linda A. Vorobik +  and Hana Pazdírková +
Inflorescence architecture
spicate +  and ebracteate +
Inflorescence arrangement
racemose +  and paniculate +
Inflorescence position or structure subtype
terminal +
Intercostal region pubescence
glabrous +  and pubescent +
Intercostal region variability
varying +
Internode architecture
solid +  and hollow +
Internode length
elongated +
Layer presence
absent +
Leaf arrangement
distichous +
Leaf margin arrangement
Overlapping (?) +
Lemma apex architecture or shape
bilobed +
Lemma architecture
7-9-veined +
Lemma architecture or shape
awned +
Lemma pubescence
with non-uncinate hairs +  and glabrous +
Lemma shape
acute +  and acuminate +
Lemma some measurement
0.18 cm1.8 mm <br />0.0018 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
Lemma texture
firmly membranous +  and coriaceous +
Ligule architecture or pubescence or shape
ciliate +
Ligule presence
absent +
Ligule some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Ligule texture
membranous +
Lobe character
pubescence +
Lobe density
dense +
Lobe length or size
longer than wide +
Lobe orientation
spreading +
Lobe shape
setaceous +
Lodicule fusion
free +
Lodicule prominence
inconspicuous +
Lodicule pubescence
ciliate +  and glabrous +
Lodicule quantity
2 +
Lodicule texture
fleshy +
Lower glume some measurement
0.42 cm4.2 mm <br />0.0042 m <br /> (0.62 cm6.2 mm <br />0.0062 m <br />) +
Lower glume variability
exceeding the distal florets +  and equaling +
Margin coloration
hyaline +
Margin pubescence
glabrous +  and pubescent +
Margin variability
varying +
Microhair presence
absent +
Midrib architecture
simple +
Midvein size
extended +
Mucro some measurement
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Node prominence
concealed +  and prominent +
Number of lower taxa
0 +
Other quantity
2 +  and 1 +
Ovary development
developed +
Ovary presence
absent +
Ovary pubescence
glabrous +
Palea architecture
2-veined +
Palea development
well-developed +
Palea height or length or size
shorter +
Palea shape
2-keeled +  and spatulate +
Palea some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Palea texture
membranous +
Panicle atypical some measurement
1 cm10 mm <br />0.01 m <br /> (?) +
Panicle density
dense +
Panicle length
1cm +  and 7cm +
Panicle some measurement
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Panicle width
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Papilla presence
absent +
Pedicel life cycle
falling +
Pericarp arrangement
separating +
Pericarp condition or texture
dry +
Pericarp texture
dry +  and fleshy +
Plants annual arrangement or pubescence
tufted +
Plants perennial arrangement or pubescence
tufted +
Plants perennial duration
short-lived +
Rachilla extension presence
absent +
Rachis prominence
evident +
Reference
None +
Sheath architecture
open +
Sheath condition
closed +
Sheath height or length or size
usually shorter +
Sinuse shape
Mucronate (?) +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25 970.xml +
Special status
Introduced +
Spikelet fixation
attached +
Spikelet quantity
single +
Spikelet reproduction
sterile +, bisexual +  and unisexual +
Spikelet some measurement
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Stamen quantity
1 +  and 3 +
Starch-grain architecture
compound +
Starch-grain architecture or shape
cleft +
Starch-grain presence
absent +
Style-branch atypical quantity
4 +  and 1 +
Style-branch quantity
2 (?) +  and 3 (?) +
Style quantity
2 +
Subsidiary-cell architecture
parallel-sided +
Subsidiary-cell shape
dome--shaped +
Synonyms
Gramineae +
Taxon family
Poaceae +
Taxon name
Schismus arabicus +
Taxon parent
Schismus +
Taxon rank
species +
Tissue coloration
hyaline +
Tissue texture
membranous +
Upper glume some measurement
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Vascular-bundle quantity
1 +
Vein character
pubescence +
Vein density
dense +
Vein length or size
longer than wide +
Vein orientation
spreading +
Vein presence
absent +
Vein quantity
2 (?) +
Vein size
major +
Volume
Volume 25 +
Whole organism architecture
stoloniferous +  and rhizomatous +
Whole organism arrangement or pubescence
tufted +
Whole organism duration
annual +
Whole organism growth form
plant +
Whole organism growth form or habitat
aquatic +  and terrestrial +
X chromosome quantity
6 +