Blue-eyed grass is actually related to irises, not grasses, but it has a long narrow leaf which is somewhat grass-like. The flower is bright blue and opens only in full sun. A very local species, mainly found in the Lough Erne region of Fermanagh in wet pasture and lake shores. The species is a member of the so-called American element of the Irish flora, being absent from any other part of Eurasia, but occurring mainly in North America. (Compare Spiranthes romanzoffiana). Other members of the genus are grown as garden plants, especially S. californicum and S. brachypus, with cream or yellow flowers.
All names: Sisyrinchium bermudiana L.; Sisyrinchium graminoides Bickn.; Sisyrinchium hibernicum A. & D.Loeve; Sisyrynchium bermudiana L.; Sisyrynchium angustifolium Mill.