BLUE-EYED GRASS
Sisyrinchium angustifolium
6 to 12 inches
Fast rate of growth
Full sun
Prefers moist, well-drained soil
Zones 8 to 11
A low-growing, herbaceous perennial with long,
narrow leaves that resembles a clump of grass when not in bloom;
and blue to violet star-shaped flowers that bloom profusely in spring.
Perfect for the edge of ponds.
http://florida.plantatlas.usf.edu/Plant.aspx?id=618
http://regionalconservation.org/beta/nfyn/plantdetail.asp?tx=Sisyangu

