Chrysanthemums (/krɪˈsænθəməmz/ kriss-AN-thə-məmz), sometimes abbreviated to 'mums' or 'chrysanths', are perennial herbaceous flowering plants in the family Asteraceae that bloom in the autumn. They are native to East Asia and northeastern Europe. Most species originate from East Asia, and the center of diversity is in China. Many thousands of horticultural varieties and cultivars exist.
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Center of diversity in the context of Buxus
Buxus is a genus of about seventy species in the family Buxaceae. Common names include box and boxwood.
The boxes are native to western and southern Europe, southwest, southern and eastern Asia, Africa, Madagascar, northernmost South America, Central America, Mexico and the Caribbean, with the majority of species being tropical or subtropical; only the European and some Asian species are frost-tolerant. Centres of diversity occur in Cuba (about 30 species), China (17 species) and Madagascar (9 species).