[O. taraxacifolia] Dandelion-Leaved Sundrop Onagraceae:
A low growing species with bright yellow, fragrant, flowers and rich green, lanceolate, some-what dandelion shaped leaves. This species is low growing and grow 4 inches tall, blooms in early summer. The flowers open in the evening and since the flowers are large one can watch as the flower open in a matter of a few minutes. Later, four-angled seedpods are produced, which are also attractive. Deer resistant and drought tolerant once established. Nice trailing habit making it useful as a ground cover or rock garden subject. Plants can be short lived but self seed enough to keep comming back year after year.
Surface sow the seeds, light needed for best germination, use F60-70, germination in 10-30 days. If no germination move to 32-39F for 6 weeks then back to 65F.