Seaside Daisy (Erigeron glaucus)

Nice little low green plant with daisies. The daisies look white, pale pink, pale blue, or lavender, depending on the light. The ones in the photo are in partial sun in the summer, full shade in the winter. They get a little bit of supplemental water: I spray them for a few minutes when I water my street tree every few weeks in the summer. They have spread out to make a pretty nice groundcover. In the picture, the seaside daisy is the green plant to the center bottom left-ish with 2 white flowers in the center. This one has been there about a year and has been blooming periodically the whole time.