Tridax procumbens

Linnaeus

Sp. Pl. 2: 900. 1753.

WeedyIntroducedIllustrated
Treatment appears in FNA Volume 21. Treatment on page 180.

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"
not tailed +, rounded +  and obtuse +
darkened +  and pale +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
John L. Strother +
Linnaeus +
decurrent +
compound +  and simple +
4 cm40 mm <br />0.04 m <br /> (12 cm120 mm <br />0.12 m <br />) +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
3-lobed +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
yellowish +  and pale-yellow +
piloso-sericeous +
obconic +  and obpyramidal 3-angled 4-angled or 5-angled +
fertile +  and bisexual +
fertile +  and bisexual +
Fla. +, Tex. +  and Mexico +
0–10 m +
strigillose +, hirsute +  and glabrate +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Disturbed sites +
cymiform +, corymbiform +, discoid +  and radiate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cylindric;hemispheric +
cauline +  and basal +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
entire +  and erose +
0.5 cm5 mm <br />0.005 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
persistent +
aristate +, laciniate +, fimbriate +  and spatulate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering Jan–Dec. +
11 +  and 15 +
unequal +  and subequal +
bearing subulate enations +, hairy +  and bristly +
convex;conic +
setiform +  and plumose +
exalbuminous +
Weedy +, Introduced +  and Illustrated +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Tridax procumbens +
species +
cylindric +
coarsely toothed +  and subentire +
40 cm400 mm <br />0.4 m <br /> (80 cm800 mm <br />0.8 m <br />) +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
150 cm1,500 mm <br />1.5 m <br /> (300 cm3,000 mm <br />3 m <br />) +
shrub +  and subshrub +