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Cretaceous
- Asterales are angiosperms, flowering plants that appeared about 140 million years ago. The Asterales order probably originated in the Cretaceous (145 – 66 Mya) on the supercontinent Gondwana which broke up from 184 – 80 Mya, forming the area that is now Australia, South America, Africa, India and Antarctica.
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The Asterales order probably originated in the Cretaceous (145 – 66 Mya) on the supercontinent Gondwana which broke up from 184 – 80 Mya, forming the area that is now Australia, South America, Africa, India and Antarctica. Asterales contain about 14% of eudicot diversity.
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The family Asteraceae (/ ˌ æ s t ə ˈ r eɪ s i iː,-s i aɪ /), with the original name Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae were first described in the year 1740.
History. Genetic analysis carried out after APG II maintains that the sister to all other asterids are the Cornales. A second order that split from the base of the asterids are the Ericales. The remaining orders cluster into two clades, the lamiids and the campanulids.
Asterales, daisy order of flowering plants, containing 11 families and some 26,870 species. Asterales is part of the core asterid clade (organisms with a single common ancestor) in the euasterid II group of the Angiosperm Phylogeny Group III (APG III) botanical classification system. The major.
The Asterales order probably originated in the Cretaceous (145 – 66 Mya) on the supercontinent Gondwana which broke up from 184 – 80 Mya, forming the area that is now Australia, South America, Africa, India and Antarctica. Asterales contain about 14% of eudicot diversity.
Fossils assignable to the order Asterales are known from the Oligocene, circa 29 million years ago (mya). Wikström et al. suggest an age of 96 to 93 mya for the crown group, where Bremer et al has advanced the estimate of 90 to 82 mya for the crown group; Janssens et al. date stem group Asterales to 104±12.1 mya and the crown group to 94±11. ...
Taxonomy and Classification. Asteraceae is a family of vascular plants that belongs to the order Asterales, which includes several other families such as Calyceraceae and Goodeniaceae. Asteraceae is further divided into 12 subfamilies, with each subfamily containing several tribes.