Crepis pulchra
This is a non-native herbaceous plant which can reach 64cm in height (25inches). The leaves are alternate. Each leaf is toothed and the basal eaves are pinnately lobed. The stem leaves have backward pointing teeth on each side that clasp the stem.
The flowers have numerous parts and are up to 2cm wide (0.75 inches). They are yellow. Blooms first appear in early summer and continue into early fall. Most of the bracts are the same length and in one circle except for some small ones at the base.