familyPoaceae
subfamilyPoaceae subfam. Aristidoideae
tribePoaceae tribe Aristideae
genusAristida
speciesAristida ramosissima

Aristida ramosissima

Engelm. ex A. Gray
Kelly W. Allred
Common names: S-curve threeawn
Endemic
Synonyms: Aristida ramosissima var. chaseana
Treatment appears in FNA Volume 25. Treatment on page 326.
Please click on the illustration for a higher resolution version.
Illustrator: Andy Sudkamp, Linda A. Vorobik

Copyright: Utah State University

Plants annual. Culms 20-60 cm, wiry. Leaves cauline; sheaths usually shorter than the internodes, mostly glabrous, sparsely hairy near the summit; collars hispidulous, occasionally glabrous; ligules 0.2-0.5 mm; blades 3-22 cm long, to 2 mm wide, flat to involute, glabrous abaxially, sparsely pilose adaxially, without a prominent midrib but with a thickened vein near each margin, pale to gray-green, sometimes slightly glaucous. Inflorescences paniculate or racemose, 5-12 cm long, 2-4 cm wide; primary branches barely developed. Spikelets appressed to slightly divergent from the axillary pulvini. Glumes subequal, apices bifid, awned from the sinuses; lower glumes (9) 11-16 mm, 3-7-veined, awns 0.5-2 (4) mm; upper glumes 11-18 mm, 1-3-veined, awns 3-7 mm; calluses 0.4-1 mm; lemmas (8) 15-20 (22) mm, dark, occasionally banded or spotted, apices narrowed but not beaklike; central awns 12-25 mm, bases with a semicircular bend; lateral awns 1-4 mm, erect, occasionally lacking; anthers 3, about 3 mm, brown. Caryopses 9-11 mm, dark-brown to black. 2n = unknown.

Distribution

Tenn., Okla., Tex., La., Mo., Ohio, Kans., Ark., Ill., Miss., Ind., Iowa, Ky.

Discussion

Aristida ramosissima grows in open, dry, sterile ground, fallow fields, and roadsides. It is restricted to the United States.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Aristida ramosissima"
RDF feed
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 +
Anther coloration
brown +
Anther quantity
3 +
Anther some measurement
3 cm30 mm <br />0.03 m <br /> (?) +
Apex architecture or shape
awned +  and bifid +
Apex shape
not beaklike +  and narrowed +
Arm cell presence
absent +
Arm cell quantity
kranz +
Auricle presence
absent +
Auricle quantity
lacking +
Author
Kelly W. Allred +
Authority
Engelm. ex A. Gray +
Awn atypical quantity
1 (?) +  and 3 (?) +
Awn atypical some measurement
4 cm40 mm <br />0.04 m <br /> (?) +
Awn base presence
absent +
Awn base size
reduced +
Awn course
straight +
Awn orientation
ascending +  and spreading +
Awn quantity
1 +
Awn some measurement
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
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 coloration
pale +  and gray-green +
Blade length
3 cm30 mm <br />0.03 m <br /> (22 cm220 mm <br />0.22 m <br />) +
Blade pubescence
glaucous +, pilose +  and glabrous +
Blade shape
flat +  and involute +
Blade width
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Branch shape
spikelike +
Callus development
well-developed +
Callus pubescence
hirsute +
Callus some measurement
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Caryopsis coloration
dark-brown +  and black +
Caryopsis life cycle
falling +
Caryopsis shape
fusiform +
Caryopsis some measurement
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Cell architecture or arrangement
non-radiate +  and radiate +
Cell position
adaxial +
Central awn some measurement
1.2 cm12 mm <br />0.012 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Collar pubescence
glabrous +  and hispidulous +
Common name
S-curve threeawn +
Culm architecture
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 +
Culm some measurement
20 cm200 mm <br />0.2 m <br /> (60 cm600 mm <br />0.6 m <br />) +
Culm texture
not woody +
Distribution
Tenn. +, Okla. +, Tex. +, La. +, Mo. +, Ohio +, Kans. +, Ark. +, Ill. +, Miss. +, Ind. +, Iowa +  and Ky. +
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
1-3-veined +
Glume architecture or shape
awned +
Glume length or size
often longer +
Glume position
subtending +
Glume quantity
2 +
Glume shape
acute +  and acuminate +
Glume size
subequal +
Glume width
thin +
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
Present +
Illustration copyright
Utah State University +
Illustrator
Linda A. Vorobik +  and Andy Sudkamp +
Inflorescence architecture
not leafy +
Inflorescence arrangement
racemose +  and paniculate +
Inflorescence length
5 cm50 mm <br />0.05 m <br /> (?) +  and 12 cm120 mm <br />0.12 m <br /> (?) +
Inflorescence position or structure subtype
terminal +
Inflorescence width
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Internode architecture
hollow +
Internode length
elongated +
Lateral awn orientation
erect +
Lateral awn prominence
obsolete +
Lateral awn quantity
lacking +
Lateral awn size
reduced +
Lateral awn some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Layer presence
absent +
Leaf arrangement
distichous +
Leaf position
cauline +
Lemma apex shape
narrowed +
Lemma architecture
3-veined +
Lemma architecture or shape
awned +
Lemma arrangement or shape
convolute +
Lemma atypical some measurement
8 +
Lemma coloration
spotted +, banded +  and dark +
Lemma margin arrangement
overlapping +
Lemma pubescence
glabrous +
Lemma relief
scabridulous +
Lemma shape
fusiform +
Lemma some measurement
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Lemma texture
coriaceous +
Ligule presence
absent +
Ligule prominence
indistinguishable +
Ligule quantity
2 (?) +
Ligule some measurement
0.02 cm0.2 mm <br />2.0e-4 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 +
Lower glume architecture
3-7-veined +
Lower glume atypical some measurement
9 +
Lower glume some measurement
1.1 cm11 mm <br />0.011 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
Microhair presence
absent +
Midrib architecture
simple +
Midrib prominence
prominent +
Node prominence
concealed +  and prominent +
Number of lower taxa
0 +
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 arrangement
divaricate +  and divergent +
Primary branch development
developed +
Primary branch orientation
ascending;usually appressed;ascending +
Rachilla extension presence
absent +
Rachilla length
not prolonged +
Rachis prominence
evident +
Reference
None +
Sheath architecture
open +
Sheath condition
closed +
Sheath height or length or size
usually shorter +
Sheath presence
absent +
Sheath pubescence
hairy +  and glabrous +
Sheath quantity
1 (?) +  and Anatomy (?) +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V25/V25 999.xml +
Special status
Endemic +
Spikelet arrangement
divergent +
Spikelet fixation
attached +
Spikelet fixation or orientation
appressed +
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
Aristida ramosissima var. chaseana +
Taxon family
Poaceae +
Taxon name
Aristida ramosissima +
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 +
Upper glume architecture
1-3-veined +
Upper glume some measurement
1.1 cm11 mm <br />0.011 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Vein presence
absent +
Vein quantity
2 (?) +
Vein size
major +
Vein size or width
thickened +
Volume
Volume 25 +
Whole organism architecture
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 +
Whole organism growth form or texture
herbaceous +
X chromosome quantity
12 +  and 11 +