Glyptopleura

Glyptopleura is a genus of North American plants in the dandelion family. The common names for this plant include carveseed, holy dandelion, keysia, and crustleaf.
This plant grows low to the ground from a flat basal rosette of distinctive lobed green leaves outlined in eye-catching hard white borders. The flesh is rich in milky sap. The flowers are ligulate, bearing long ray florets with toothed ends, which may be white, cream, or pale yellow.