Oenothera speciosa, is at home to rocky prairies, woodlands, roadsides, and meadows of temperate American zones, features fragrant, bowl-shaped, four-petaled and linght pink flowers. This variety keeps abloom from May till July. [Photo from WeChat: csnbgsh]

Leucanthemum maximum is an herbaceous perennial originally native to meadows, grasslands and alpine areas of Pyrenees in Europe, which has escaped cultivation and become naturalized in many regions of China. The attractive blooms feature prominent, yellow centers surrounded by many bright, white rays. [Photo from WeChat: csnbgsh]