Apparently Olsynium douglasii, which belongs to the Iridaceae family (Iris) is sometimes identified as Sisyrinchium douglassii, and commonly as grasswidows. It grows to about 30cm (12") tall.
Although this spring flowering plant looks quite delicate apparently it can grow wildly and in great profusion in the right place. It can grow in many places in north America and likes: coastal bluffs, prairies, open rocky areas, oak and ponderosa pine woodlands, sagebrush and juniper desert, where moist in early spring (Burke Museum of Natural History and Culture, website).
http://en.wikipedia.org/wiki/Olsynium_douglasii
Burke Museum of Natural History and Culture, website - Olsynium douglasii.