familyAsteraceae
tribeAsteraceae tribe Heliantheae
subtribeAsteraceae (tribe Heliantheae) subtribe Galinsoginae
genusTridax
speciesTridax procumbens

Tridax procumbens

Linnaeus

Sp. Pl. 2: 900. 1753.

John L. Strother
WeedyIntroducedIllustrated
Treatment appears in FNA Volume 21. Treatment on page 180.
Please click on the illustration for a higher resolution version.
Illustrator: Yevonn Wilson-Ramsey

Copyright: Flora of North America Association

Leaves: petioles 1–10 (–30) mm; blades 10–40 (–120) × 5–20 (–60) mm, often 3-lobed. Cypselae 2–2.5 mm; pappi 4–5 (–7.5) mm. 2n = 36.


Phenology: Flowering Jan–Dec.
Habitat: Disturbed sites
Elevation: 0–10 m

Distribution

V21-441-distribution-map.gif

Introduced; Fla., Tex., Mexico

Discussion

Tridax procumbens is listed as a noxious weed for United States and is listed as a pest or noxious weed for nine or more states.

Selected References

None.

Lower Taxa

None.
... more about "Tridax procumbens"
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2n chromosome quantity
36 +
Anther base shape
not tailed +, rounded +  and obtuse +
Anther dehiscence
introrse +
Anther fusion
connate +
Anther theca coloration
darkened +  and pale +
Apex fusion
connate +  and distinct +
Apex growth form or texture
herbaceous +
Apex size
subequal +
Apex texture
scarious +
Apical appendage presence
absent +
Apical appendage shape
usually ovate +  and lanceolate +
Appendage pubescence
hirsute +
Appendage relief
papillate +
Appendage shape
usually deltate +  and lanceolate +
Array architecture
spiciform +, racemiform +, paniculiform +  and corymbiform +
Array development
indeterminate +  and determinate +
Author
John L. Strother +
Authority
Linnaeus +
Band architecture
continuous +
Band quantity
1 +
Base shape
decurrent +
Blade architecture
compound +  and simple +
Blade atypical length
4 cm40 mm <br />0.04 m <br /> (12 cm120 mm <br />0.12 m <br />) +
Blade atypical width
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Blade length
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Blade shape
3-lobed +
Blade width
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Body architecture
winged;ribbed;winged;ribbed +
Body architecture or pubescence or relief
smooth +
Body relief
tuberculate +  and rugose +
Bractlet quantity
1;15 +
Branch arrangement or course or shape
linear +
Branch structure in adjective form
stigmatic +
Bristle architecture
barbellulate +  and barbellate +
Bristle shape
Plumose (?) +
Calyculus presence
absent +
Calyculus quantity
Of 1 (15+ bractlets) +
Corolla architecture
zygomorphic +
Corolla coloration
yellowish +  and pale-yellow +
Cypsela architecture
monomorphic +
Cypsela architecture or shape
beaked +
Cypsela growth form
dimorphic +
Cypsela pubescence
piloso-sericeous +
Cypsela shape
obconic +  and obpyramidal 3-angled 4-angled or 5-angled +
Cypsela some measurement
2mm;2.5mm +
Disc-floret atypical quantity
20 (40) +
Disc-floret quantity
40 (80) +
Disc-floret reproduction
fertile +  and bisexual +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distribution
Fla. +, Tex. +  and Mexico +
Elevation
0–10 m +
Embryo course
straight +
Face pubescence
strigillose +, hirsute +  and glabrate +
Face relief
scabrellous +
Filament fusion
distinct +
Floret architecture
pistillate +, staminate +  and neuter +
Floret atypical quantity
5;15 +
Floret position
proximal +
Floret quantity
1;5 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Glomerule arrangement
singly +
Habitat
Disturbed sites +
Head architecture
cymiform +, corymbiform +, discoid +  and radiate +
Head architecture or arrangement
radiate +
Head arrangement
singly +
Head development
indeterminate +
Head reproduction
homogamous +  and heterogamous +
Illustration
Present +
Illustration copyright
Flora of North America Association +
Illustrator
Yevonn Wilson-Ramsey +
Individual head architecture
each +  and sessile +
Introduced
true +
Involucre diameter
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Involucre position relational
surrounding +
Involucre shape
cylindric;hemispheric +
Leaf architecture
petiolate +
Leaf arrangement
opposite +
Leaf position
cauline +  and basal +
Line quantity
2 +
Lobe atypical quantity
3 (5) +
Lobe quantity
5 (?) +
Lobe shape
deltate +
Margin architecture or shape
dentate to pinnatifid or palmatifid +  and entire +
Number of lower taxa
0 +
Ovary architecture
2-carpellate +
Ovary architecture or structure in adjective form
1-locular +
Ovary position
inferior +
Ovule fixation
attached +
Ovule orientation
anatropous +
Ovule quantity
1 +
Pappus architecture
entire +  and erose +
Pappus atypical some measurement
0.5 cm5 mm <br />0.005 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
Pappus duration
persistent +
Pappus life cycle
falling +
Pappus presence
absent +
Pappus shape
aristate +, laciniate +, fimbriate +  and spatulate +
Pappus some measurement
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Petiole atypical some measurement
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Petiole some measurement
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Phenology
Flowering Jan–Dec. +
Phyllary duration
persistent +
Phyllary fusion
distinct +
Phyllary life cycle
falling +
Phyllary quantity
11 +  and 15 +
Phyllary shape
Ovate (Oblong) +
Phyllary size
unequal +  and subequal +
Phyllary texture
Herbaceous (Chartaceous) +
Publication title
Sp. Pl. +
Publication year
1753 +
Ray-floret architecture
pistillate +
Ray-floret atypical quantity
8 (13) +
Ray-floret presence
absent +
Ray-floret quantity
3 (8) +
Ray-floret reproduction
fertile +
Receptacle architecture
paleate +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle shape
convex;conic +
Reference
None +
Root texture
fibrous +
Scale atypical quantity
20 (40) +
Scale quantity
20 +
Scale shape
setiform +  and plumose +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
25+ (40) +
Series quantity
2;3 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21 441.xml +
Special status
Weedy +, Introduced +  and Illustrated +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem growth form
procumbent +
Stem orientation
ascending +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
hirsutulous +  and glabrous +
Style quantity
1 +
Style relief
papillate +
Synonyms
Compositae +
Taxon family
Asteraceae +
Taxon name
Tridax procumbens +
Taxon parent
Tridax +
Taxon rank
species +
Throat shape
cylindric +
Tube height or length or size
shorter +
Ultimate margin shape
coarsely toothed +  and subentire +
Volume
Volume 21 +
Whole-organism atypical some measurement
40 cm400 mm <br />0.4 m <br /> (80 cm800 mm <br />0.8 m <br />) +
Whole-organism duration
perennial +
Whole-organism some measurement
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
Whole organism atypical some measurement
150 cm1,500 mm <br />1.5 m <br /> (300 cm3,000 mm <br />3 m <br />) +
Whole organism growth form
shrub +  and subshrub +
Whole organism some measurement
10cm (150cm) +
X chromosome quantity
10 +