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Aster

Aster (syn. Diplopappus Cass.) is a genus of flowering plants in the family Asteraceae. The genus once contained nearly 600 species in Eurasia and North America, but after morphologic and molecular research on the genus during the 1990s, it was decided that the North American species are better treated in a series of other genera. After this split there are roughly 180 species within the genus, all but one being confined to Eurasia. The name Aster comes from the Ancient Greek word astron , meaning "star", arriving through the Latin word astrum with the same meaning, referring to the shape of the flower head. Many species and a variety of hybrids and varieties are popular as garden plants because of their attractive and colourful flowers. Aster species are used as food plants by the larvae of a number of Lepidoptera species - see list of Lepidoptera that feed on Aster. Asters can grow in all hardiness zones.

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:

Aster alpinus , Alpine Aster
Aster amellus , European Michaelmas Daisy or Italian Aster
Aster lateriflorus , Lady in Black
Aster linosyris , Goldilocks Aster
Aster pringlei
Aster scaber
Aster sibiricus
Aster tataricus , Tatarian Aster
Aster tongolensis
Aster tripolium , Sea Aster

Some common North American species that have now been moved are:

Aster breweri (now Eucephalus breweri ), Brewer's Aster
Aster cordifolius (now Symphyotrichum cordifolium ), Blue Wood Aster
Aster divaricatus (now Eurybia divaricata ), White Wood Aster
Aster ericoides (now Symphyotrichum ericoides ), Heath Aster
Aster laevis (now Symphyotrichum laeve ), Smooth Aster
Aster novae-angliae (now Symphyotrichum novae-angliae ), New England Aster
Aster novi-belgii (now Symphyotrichum novi-belgii ), New York Aster
Aster peirsonii (now Oreostemma peirsonii ), Peirson's Aster
Aster pilosus (now Symphyotrichum pilosum) , Frost Aster
Aster scopulorum (now Ionactis alpina ), Lava Aster

The China aster is in a related genus, Callistephus .

References

^ ^a ^b Brouillet, Luc; Barkley, Theodore M.; Strother, John L. (2006), "Astereae", in Flora of North America Editorial Committee, eds. 1993+, Flora of North America , 20 , New York & Oxford: Oxford University Press, pp. 3

More Information About The Aster

Aster

ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) is a high resolution imaging instrument that is flying on the Terra satellite. ASTER will obtain detailed ...

ASTER: Advanced Spaceborne Thermal Emission and Reflection Radiometer

Aster (syn. Diplopappus Cass.) is a genus of flowering plants in the family Asteraceae. The genus once contained nearly 600 species in Eurasia and North America, but after ...

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