Saturday, 26 July 2014
Aster is a genus of flowering plants in the family Asteraceae.
Its circumscription has been narrowed, and it now encompasses around 180
species, all but one of which are restricted to Eurasia; many species formerly
in Aster are now in other
genera of the tribe Astereae. The genus Aster
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 related genera.
After this split there are roughly 180 species within the genus, all but one
being confined to Eurasia. Source
