Coreopsideae
Coreopsideae is a tribe of flowering plants belonging to the Asteroideae subfamily. 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). In the late 20th century, molecular studies caused a slightly redefined version of this group to be recognized as its own tribe, Coreopsideae. The larger version of Heliantheae was split into tribes including Bahieae, Chaenactideae, Coreopsideae, Helenieae and, finally, Heliantheae (sensu stricto). Within the tribe, the traditional definition of genera based on flower and fruit characters does not reflect evolutionary relationships as inferred through molecular phylogenetics. 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. 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.
| Coreopsideae | |
|---|---|
| |
| Cosmos bipinnatus field | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| 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
[edit]The 27 Coreopsideae genera recognized by the Global Compositae Database as of March 2025:[7]
- Bidens L.
- Chrysanthellum Rich.
- Coreocarpus Benth.
- Coreopsis L.
- Cosmos Cav.
- Cyathomone S.F.Blake
- Dahlia Cav.
- Dicranocarpus A.Gray
- Diodontium F.Muell.
- Ericentrodea S.F.Blake
- Fitchia Hook.f.
- Glossocardia Cass.
- Goldmanella Greenm.
- Henricksonia B.L.Turner
- Heterosperma Cav.
- Hidalgoa La Llave
- Isostigma Less.
- Koehneola Urb.
- Moonia Arn.
- Narvalina Cass.
- Oparanthus Sherff
- Petrobium R.Br.
- Pinillosia Ossa ex DC.
- Selleophytum Urb.
- Tetraperone Urb.
- Thelesperma Less.
- Trioncinia (F.Muell.) Veldkamp
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
[edit]- ^ Asteroideae - Taxonomy
- ^ 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
- ^ Klaus Kubitzki, Joachim W. Kadereit, Charles Jeffrey; The Families and Genera of Vascular Plants
- ^ 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
- ^ Niehaus, Theodore F.; Ripper, Charles L. (1976), Pacific States Wildflowers, New York: Houghton Mifflin, ISBN 0-395-91095-1
- ^ 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.
- ^ "Coreopsideae Lindl". Global Compositae Database. Compositae Working Group (CWG). Retrieved 13 March 2025.
- ^ "Anacis Schrank". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 15 March 2025.
- ^ 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
- ^ "Electranthera Mesfin, D.J.Crawford & Pruski". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 13 March 2025.
- ^ "Epilepis Benth". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 13 March 2025.
- ^ "Leptosyne DC". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 13 March 2025.
- ^ "Silphidium (Torr. & A.Gray) Mesfin & D.J.Crawford". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 15 March 2025.
- ^ "Selleophytum Urb". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 13 March 2025.
External links
[edit]
Media related to Coreopsideae at Wikimedia Commons
Data related to Coreopsideae at Wikispecies
