Chrysanthemum, (genus Chrysanthemum), genus of about 40 species of flowering plants in the aster family (Asteraceae), native primarily to subtropical and temperate areas of the Old World.

Thanks @ Shravan M Haldhar,

Please share the source of information.

Please have a look at the following link.

http://www.theplantlist.org/browse/A/Compositae/Chrysanthemum/

@ Arvind Singh,

Thanks. This list is suspended one.

Please check the following link.

https://www.jstor.org/stable/24110912?seq=1#page_scan_tab_contents

@ Professor M. C. Sidhu Sir

Please go through the following link.

http://www.plantsoftheworldonline.org/taxon/urn:lsid:ipni.org:names:331492-2

Thanks!

Also, take a look at this:

Article The genus Chrysanthemum: Phylogeny, biodiversity, phytometab...