The genus Aster is now generally restricted to the Old World species, with Aster amellus being the type species of the genus, as well as of the family Asteraceae. The New World species have now been reclassified in the genera Almutaster, Canadanthus, Doellingeria, Eucephalus, Eurybia, Ionactis, Oligoneuron, Oreostemma, Sericocarpus and Symphyotrichum, though all are treated within the tribe Astereae. Regardless of the taxonomic change, all are still widely referred to as "asters" in the horticultural trades. See the List of Aster synonyms for more information.
In the UK there are only two native members of the genus of which one, Goldilocks is very rare, the other being Aster tripolium, the Sea aster. Aster alpinus spp. vierhapperi is the only species native to North America.
Some common species are:
Some common North American species that have now been moved are:
The China aster is in a related genus, Callistephus.
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