oenothera speciosa

Oenothera speciosa is a species of evening primrose known by several common names, including pinkladies, pink evening primrose, showy evening primrose, Mexican primrose, amapola, and buttercups (not to be confused with true buttercups in the genus Ranunculus).

It is a herbaceous perennial wildflower. Originally native to the grasslands of Kansas, Missouri, Nebraska, northeastern New Mexico, Oklahoma, and Texas, it has been naturalized in 28 of the lower 48 U.S. states as well as Chihuahua and Coahuila ...