Coreopsis rosea is a plant species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 of the genus Coreopsis in Asteraceae. Coreopsis species are commonly called tickseeds. It is native to eastern North America, in a number of Atlantic states and Nova Scotia, Canada. It grows in wet areas such as marsh edges. Unlike most Coreopsis species, the ray florets are pink to white (instead of yellow). The only other Coreopsis species with pink rays is C. nudata

Coreopsis nudata

Coreopsis nudata is a herbaceous perennial plant species of the genus Coreopsis in Asteraceae. Coreopsis species are commonly called tickseeds....

; C. rosea does not seem to be closely related to Coreopsis species which merely have red dots at the base of the rays.