Tithonia

Tithonia is a genus of flowering plants in the sunflower tribe within the family Asteraceae.[4][5]

Tithonia
Tithonia diversifolia
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Supertribe: Helianthodae
Tribe: Heliantheae
Genus: Tithonia
Desf. ex Juss. 1789 not Kuntze 1891 (Phytolaccaceae)[1]
Synonyms[2][3]
  • Urbanisol Kuntze
  • Mirasolia (Sch.Bip.) Benth.
  • Tithonia sect. Mirasolia (Sch.Bip.) La Duke

Tithonia has a center of distribution in Mexico but with one species extending into the Southwestern United States and several native to Central America. Two species, T. diversifolia and T. rotundifolia, are widely cultivated and have escaped to become weeds in tropical and subtropical areas around the world. The distinguishing feature of the genus is the peduncle, which is fistulose (meaning hollow and flaring toward the apex). The plants are coarse annual or perennial herbs or shrubs, and one species, T. koelzii, is a small tree.[6]

Species[2][7][8]
formerly included[2]

see Comaclinium Enceliopsis Lasianthaea Viguiera

  • Tithonia angustifolia - Viguiera angustifolia
  • Tithonia argophylla - Enceliopsis argophylla
  • Tithonia decurrens - Viguiera decurrens
  • Tithonia excelsa - Viguiera excelsa
  • Tithonia ovata - Lasianthaea helianthoides
  • Tithonia pusilla - Viguiera pusilla
  • Tithonia splendens - Comaclinium montanum
Mexican Sunflower
Tithonia rotundifolia

References
  1. "Tropicos, search for ''Tithonia''". Tropicos.org. Retrieved 2018-08-31.
  2. Flann, C (ed) 2009+ Global Compositae Checklist Archived 2014-11-06 at Archive.today
  3. "Tithonia Desf. ex Juss". Germplasm Resources Information Network. United States Department of Agriculture. 1996-09-17. Retrieved 2010-06-06.
  4. Jussieu, Antoine Laurent de. 1789. Genera Plantarum 189 in Latin
  5. "Tropicos, ''Tithonia'' Desf. ex Juss". Tropicos.org. Retrieved 2018-08-31.
  6. "Flora of North America, Vol. 21 Page 138, Sunflowerweed, ''Tithonia'' Desfontaines ex Jussieu, Gen. Pl. 189. 1789". Efloras.org. Retrieved 2018-08-31.
  7. "Tithonia". Integrated Taxonomic Information System. Retrieved 6 June 2010.
  8. "Species Records of Tithonia". Germplasm Resources Information Network. United States Department of Agriculture. Retrieved 2010-06-06.
  • La Duke, J. C. 1982. Revision of Tithonia. Rhodora 84: 453–522.

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