Rayjacksonia phyllocephala (Camphor Daisy, Tansyaster)

Order Asterales, Family Asteraceae, Genus Rayjacksonia

This cousin of M. pattersonii has been renamed, and is presented here under the new name. I only saw this flower once, at a frequently used trail head. Bad choice of location on its part! "Flora of North America" confirms that this plant is present in Colorado.