Dendranthema (den-dran' thah-mah) ;Garden Chrysanthemum; Family:Asteraceae, Aster
Formerly known as Chrysanthemum, the genus Chrysanthemum was separated into several unique genus in 1961. Although it has switched back and forth over the years, today the individual genus are commonly used in botanical nomenclature. The "corrected" genus for these common garden plants are:
Dendranthema - hardy garden mums
Leucanthemum - oxeye daisies, shasta daisies
Tanacetum - feverfew, painted daisies, tansy
Chrysanthemum is still commonly used for marginally hardy florist mums to differentiate from the true hardy Dendranthema.