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Cosmos bipinnatus field
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Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Tribe: Coreopsideae
(Less.) Lindl., 1829

See text

Coreopsideae is a tribe of flowering plants belonging to the Asteroideae subfamily. [1] It includes widely cultivated genera such 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]


Coreopsideae genera recognized by the Global Compositae Database: [7]

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  1. Asteroideae - Taxonomy
  2. 1 2 Ryding, Olof; Bremer, Kare (1992), "Phylogeny, Distribution, and Classification of the Coreopsideae (Asteraceae)", Systematic Botany, 17 (4): 649–659, 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, 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 2022-04-04.