familyPoaceae
subfamilyPoaceae subfam. Aristidoideae
tribePoaceae tribe Aristideae
genusAristida
speciesAristida ternipes

Aristida ternipes

Cav.
Kelly W. Allred
Treatment appears in FNA Volume 25. Treatment on page 323.

Plants perennial; cespitose. Culms 25-120 cm, wiry, erect to sprawling, unbranched. Leaves basal and cauline; sheaths usually longer than the internodes, glabrous; collars glabrous or strigillose; ligules less than 0.5 mm; blades 5-40 cm long, 1-2.5 mm wide, flat to folded, straight to lax at maturity, adaxial surfaces with scattered, 1.5-3 mm hairs near the ligule. Inflorescences paniculate, 15-40 cm long, (8) 10-35 (45) mm wide; rachis nodes glabrous or strigillose; primary branches 5-25 cm, remote, stiffly ascending to divaricate, with axillary pulvini, usually naked near the base; secondary branches and pedicels usually appressed. Spikelets usually congested. Glumes 9-15 mm, subequal, 1-veined, acuminate; calluses 1-1.2 mm; lemmas 9-15 mm long, smooth to tuberculate-scabrous, narrowing to slightly keeled, usually not twisted, 0.1-0.2 mm wide apices, junction with the awns not evident; awns not disarticulating at maturity, unequal or almost equal; central awns 8-25 (30) mm, straight to arcuate at the base; lateral awns absent or to 0-23 mm; anthers 3, 1.2-2.4 mm. Caryopses 6-8 mm, light brownish. 2n = 22, 24.

Distribution

Calif., Ariz., N.Mex., Tex.

Discussion

Selected References

None.

Lower Taxa

Key

1 Lateral awns 2-23 mm long Aristida ternipes var. gentilis
1 Lateral awns 0-2 mm long Aristida ternipes var. ternipes

"decumbent" is not a number.

... more about "Aristida ternipes"
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2n chromosome quantity
24 +  and 22 +
Abaxial ligule presence
absent +
Abaxial ligule quantity
of hairs +
Adaxial cell presence
absent +
Adaxial cell shape
bulliform +
Adaxial ligule architecture or pubescence or shape
of hairs +  and ciliate +
Adaxial ligule presence
absent +
Adaxial ligule texture
membranous +
Adaxial surface life cycle
maturity +
Anther quantity
3 +
Anther some measurement
0.12 cm1.2 mm <br />0.0012 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
Apex architecture or shape
3-awned +
Apex width
wide +
Arm cell presence
absent +
Arm cell quantity
kranz +
Auricle presence
absent +
Auricle quantity
lacking +
Author
Kelly W. Allred +
Authority
Cav. +
Awn architecture
not disarticulating +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn base presence
absent +
Awn base size
reduced +
Awn course
straight +
Awn orientation
ascending +  and spreading +
Awn prominence
not evident +
Awn quantity
1 +
Awn size
unequal +
Awn variability
equal +
Back shape
keeled +  and rounded +
Base architecture
coiled +, disarticulating +  and twisted +
Base arrangement
close +
Base arrangement or shape
contorted +
Base position
intravaginal +, extravaginal +, branching +  and basal +
Base size
swelling +
Base texture
hard +
Base width
thick +
Beak architecture
twisted +
Beak course
straight +
Blade architecture or arrangement
lax +
Blade course
straight +
Blade length
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
Blade shape
flat +  and folded +
Blade width
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Branch shape
spikelike +
Callus development
well-developed +
Callus pubescence
hirsute +
Callus some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Caryopsis coloration
light brownish +
Caryopsis life cycle
falling +
Caryopsis shape
fusiform +
Caryopsis some measurement
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Cell architecture or arrangement
non-radiate +  and radiate +
Cell position
adaxial +
Central awn atypical some measurement
30 +
Central awn course
straight +  and arcuate +
Central awn some measurement
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Collar pubescence
strigillose +  and glabrous +
Culm architecture
unbranched +  and wiry +
Culm architecture or arrangement or growth form
solitary +
Culm duration
annual +
Culm growth form
climbing +
Culm growth form or location
floating +
Culm orientation
erect +  and sprawling +
Culm some measurement
25 cm250 mm <br />0.25 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
Culm texture
not woody +
Distribution
Calif. +, Ariz. +, N.Mex. +  and Tex. +
Embryo presence
absent +
Embryo quantity
cleft +
Embryo size
large +  and small +
Endosperm texture
hard +
Filament shape
capillary +
Flap character
germination +
Floret architecture
pistillate +  and staminate +
Floret length or size
sometimes longer +
Floret quantity
1 +
Floret reproduction
bisexual +
Floret shape
compressed +  and terete +
Fusoid cell presence
absent +
Glume architecture
1-veined +
Glume architecture or shape
awned +
Glume length or size
often longer +
Glume position
subtending +
Glume quantity
2 +
Glume shape
acuminate +
Glume size
subequal +
Glume some measurement
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Glume width
thin +
Hair arrangement
scattered +
Hair some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Hilum arrangement or course or shape
linear +
Hilum coloration or relief
punctate +
Hilum height or length or size
short +
Hilum length or size
long +
Illustration copyright
Utah State University +
Illustrator
Linda A. Vorobik +  and Andy Sudkamp +
Inflorescence architecture
not leafy +
Inflorescence arrangement
paniculate +
Inflorescence length
15 cm150 mm <br />0.15 m <br /> (?) +  and 40 cm400 mm <br />0.4 m <br /> (?) +
Inflorescence position or structure subtype
terminal +
Inflorescence width
1 cm10 mm <br />0.01 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Internode architecture
hollow +
Internode length
elongated +
Lateral awn presence
absent +
Lateral awn prominence
obsolete +
Lateral awn quantity
0-23 mm +
Lateral awn size
reduced +
Layer presence
absent +
Leaf arrangement
distichous +
Leaf position
cauline +  and basal +
Lemma apex shape
narrowed +
Lemma architecture
twisted +
Lemma architecture or shape
awned +
Lemma arrangement or shape
convolute +
Lemma length
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Lemma margin arrangement
overlapping +
Lemma pubescence
glabrous +
Lemma pubescence or relief
smooth to tuberculate-scabrous +
Lemma relief
scabridulous +
Lemma shape
keeled +
Lemma some measurement
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
Lemma texture
coriaceous +
Lemma width
narrowing +
Ligule presence
absent +
Ligule prominence
indistinguishable +
Ligule quantity
2 (?) +
Ligule some measurement
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Lodicule fusion
free +
Lodicule presence
absent +
Lodicule prominence
inconspicuous +
Lodicule pubescence
glabrous +
Lodicule quantity
2 +
Lodicule texture
membranous +
Microhair presence
absent +
Midrib architecture
simple +
Node prominence
concealed +  and prominent +
Number of lower taxa
2 +
Other quantity
2 +  and 1 +
Ovary presence
absent +
Ovary pubescence
glabrous +
Palea architecture
2-veined +
Palea height or length or size
shorter +
Palea life cycle
maturity +
Palea position
concealing +
Palea presence
absent +
Palea quantity
0 +  and 1/2 +
Palea shape
keeled +
Paleum fixation
attached +
Pericarp arrangement
separating +
Pericarp condition or texture
dry +
Pericarp texture
dry +  and fleshy +
Primary branch architecture
naked +
Primary branch arrangement
divaricate +
Primary branch arrangement or density
remote +
Primary branch orientation
ascending +
Primary branch some measurement
5 cm50 mm <br />0.05 m <br /> (25 cm250 mm <br />0.25 m <br />) +
Rachilla extension presence
absent +
Rachilla length
not prolonged +
Rachis node pubescence
strigillose +  and glabrous +
Rachis prominence
evident +
Reference
None +
Secondary branch fixation or orientation
appressed +
Secondary pedicel fixation or orientation
appressed +
Sheath architecture
open +
Sheath condition
closed +
Sheath length or size
usually longer +
Sheath presence
absent +
Sheath pubescence
glabrous +
Sheath quantity
1 (?) +  and Anatomy (?) +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25 991.xml +
Spikelet architecture or arrangement
congested +
Spikelet fixation
attached +
Spikelet quantity
1 +  and 60 +
Spikelet reproduction
bisexual +
Stamen quantity
1 +  and 3 +
Starch-grain architecture
compound +
Stomatal subsidiary-cell shape
triangular +  and dome--shaped +
Style-branch atypical quantity
4 +  and 1 +
Style-branch quantity
2 (?) +  and 3 (?) +
Style fusion
free +
Style quantity
2 +
Synonyms
Gramineae +
Taxon family
Poaceae +
Taxon name
Aristida ternipes +
Taxon parent
Aristida +
Taxon rank
species +
Terminal awn quantity
3 +
Terminal cell architecture
thin-walled +
Terminal cell length or size
long +
Terminal cell size
slender +
Tissue coloration
hyaline +
Tissue texture
membranous +
Vein presence
absent +
Vein quantity
2 (?) +
Vein size
major +
Volume
Volume 25 +
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 +
Whole organism growth form or texture
herbaceous +
X chromosome quantity
12 +  and 11 +