Tridax

Tridax
Tridax procumbens
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Asterales
Family:	Asteraceae
Tribe:	Millerieae[1]
Genus:	Tridax L.
Type species
Tridax procumbens L.
Synonyms[1]
Ptilostephium Kunth Mandonia Wedd. Sogalgina Cass. Balbisia Willd. 1803, rejected homonym not Cav. 1804 (Vivianiaceae) nor DC. 1833 (Asteraceae) Bartolia Adans. Bartolina Adans. Carphostephium Cass. Galinsogea Kunth 1818, illegitimate homonym not Willd. 1803

Tridax is a genus of flowering plants in the daisy family.^[2][3]

Tridax is native primarily to the tropical regions of North and South America. Tridax procumbens has become naturalized in the southern United States and is considered a noxious weed in some places.

Species^[1]

1. Tridax angustifolia Spruce ex Benth. & Hook.f. - Ecuador, Peru
2. Tridax balbisioides (Kunth) A.Gray - Guanajuato
3. Tridax bicolor A.Gray - Chihuahua
4. Tridax bilabiata A.M.Powell - Guerrero
5. Tridax boliviensis (Wedd.) R.E.Fr. - Bolivia
6. Tridax brachylepis Hemsl. - Oaxaca
7. Tridax cajamarcensis H.Rob. - Peru
8. Tridax candidissima A.Gray - San Luis Potosí
9. Tridax coronopifolia (Kunth) Hemsl. - widespread from Tamaulipas to Chiapas
10. Tridax dubia Rose - Colima
11. Tridax erecta A.Gray
12. Tridax hintonii (B.L.Turner & A.M.Powell) D.J.Keil, Luckow & Pinkava - Michoacán
13. Tridax hintoniorum B.L.Turner - Nuevo León
14. Tridax luisana Brandegee - Puebla, Oaxaca
15. Tridax mexicana A.M.Powell - Guerrero, Oaxaca, Jalisco, México State, Veracruz, Nayarit, Michoacán
16. Tridax moorei B.L.Rob. - Hidalgo
17. Tridax oaxacana B.L.Turner - Oaxaca
18. Tridax obovata Turcz. - Oaxaca
19. Tridax oligantha C.E.Anderson & Beaman
20. Tridax palmeri A.Gray - San Luis Potosí
21. Tridax platyphylla B.L.Rob. - Jalisco
22. Tridax procumbens (L.) L. - Veracruz; widespread invasive
23. Tridax purpurea S.F.Blake - Guatemala, Chiapas
24. Tridax rosea Sch.Bip. ex B.L.Rob. & Greenm. - Hidalgo, D.F.
25. Tridax tambensis Hieron. - Peru, Ecuador
26. Tridax tenuifolia Rose - Chihuahua
27. Tridax trilobata (Cav.) Hemsl. - Michoacán, México State
28. Tridax venezuelensis Aristeg. & Cuatrec. - Venezuela
29. Tridax yecorana B.L.Turner - eastern Sonora in Sierra Madre Occidental

formerly included^[1]

see Calea Layia Sabazia

• Tridax accedens - Calea verticillata
• Tridax ehrenbergii - Sabazia sarmentosa
• Tridax gaillardioides - Layia gaillardioides
• Tridax verticillata - Calea verticillata

References

1. Flann, C (ed) 2009+ Global Compositae Checklist
2. Linnaeus, Carl von. 1753. Species Plantarum 2: 900 in Latin
3. Tropicos, Tridax L.