Coreopsideae

Coreopsideae
Cosmos bipinnatus field
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Embryophytes
Clade: Tracheophytes
Clade: Spermatophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Tribe: Coreopsideae
(Less.) Lindl.
Genera

See text

Coreopsideae is a tribe of flowering plants belonging to the Asteroideae subfamily.[1] It includes widely cultivated genera such as Coreopsis, after which the tribe is named, as well as Cosmos and Dahlia.

A similar group has been recognized since 1829, generally as part of the tribe Heliantheae (Cassini, 1819).[2] In the late 20th century, molecular studies caused a slightly redefined version of this group to be recognized as its own tribe, Coreopsideae.[2] The larger version of Heliantheae was split into tribes including Bahieae, Chaenactideae, Coreopsideae, Helenieae and, finally, Heliantheae (sensu stricto).[3] Within the tribe, the traditional definition of genera based on flower and fruit characters does not reflect evolutionary relationships as inferred through molecular phylogenetics.[4]

The tribe is characterized by shiny green bracts at the base of the flower head in two rows: an inner row of tightly spaced bracts and an outer row of a smaller number pointing downward.[5] It includes five genera that use C4 carbon fixation: Chrysanthellum, Eryngiophyllum, Glossocardia (including Guerreroia), Isostigma, and Neuractis. These genera are thought to share a common ancestor and thus a single origin of C4 carbon fixation.[6]

Genera

The 27 Coreopsideae genera recognized by the Global Compositae Database as of March 2025:[7]

Plants of the World Online accepts the genera Anacis Schrank,[8]Electranthera Mesfin, D.J.Crawford & Pruski,[9][10] Epilepis Benth.,[11] Leptosyne DC.,[12] and Silphidium (Torr. & A.Gray) Mesfin & D.J.Crawford,[13] and treats Selleophytum as a synonym of Coreopsis.[14]

References

  1. ^ Asteroideae - Taxonomy
  2. ^ a b Ryding, Olof; Bremer, Kare (1992), "Phylogeny, Distribution, and Classification of the Coreopsideae (Asteraceae)", Systematic Botany, 17 (4): 649–659, Bibcode:1992SysBo..17..649R, doi:10.2307/2419733, JSTOR 2419733
  3. ^ Klaus Kubitzki, Joachim W. Kadereit, Charles Jeffrey; The Families and Genera of Vascular Plants
  4. ^ Rebecca T. Kimballa, Daniel J. Crawford (2004), "Phylogeny of Coreopsideae (Asteraceae) using ITS sequences suggests lability in reproductive characters", Molecular Phylogenetics and Evolution, 33 (1): 127–139, Bibcode:2004MolPE..33..127K, doi:10.1016/j.ympev.2004.04.022, PMID 15324843
  5. ^ Niehaus, Theodore F.; Ripper, Charles L. (1976), Pacific States Wildflowers, New York: Houghton Mifflin, ISBN 0-395-91095-1
  6. ^ Kellogg, E.A. (1999). "Phylogenetic aspects of the evolution of C4 photosynthesis". In Sage, R.F.; Monson, R.K. (eds.). C4 plant biology (PDF). San Diego, CA: Academic Press. pp. 411–444. ISBN 0126144400. Retrieved 2018-05-26.
  7. ^ "Coreopsideae Lindl". Global Compositae Database. Compositae Working Group (CWG). Retrieved 13 March 2025.
  8. ^ "Anacis Schrank". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 15 March 2025.
  9. ^ Pruski, J.F.; Tadesse, Mesfin & Crawford, D.J. (2015), "Studies of Neotropical Compositae–XI. The new generic name Electranthera (Coreopsideae)", Phytoneuron, 2015–68: 1–17, retrieved 2024-05-13
  10. ^ "Electranthera Mesfin, D.J.Crawford & Pruski". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 13 March 2025.
  11. ^ "Epilepis Benth". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 13 March 2025.
  12. ^ "Leptosyne DC". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 13 March 2025.
  13. ^ "Silphidium (Torr. & A.Gray) Mesfin & D.J.Crawford". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 15 March 2025.
  14. ^ "Selleophytum Urb". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 13 March 2025.
  • Wikimedia Commons logo Media related to Coreopsideae at Wikimedia Commons
  • Wikispecies logo Data related to Coreopsideae at Wikispecies

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