“ The most important genera are Crocus (q.v.) , with about 70 species, Iris (q.v.) , with about 100, and Gladiolus (q.v.) , with 150. Ixia, Freesia (q.v.) and Tritonia (including Montbretia) , all natives of South Africa, are well known in cultivation. Sisyrinchium, blue-eyed grass, is a new-world genus extending from arctic America to Patagonia and the Falkland Isles. One species, S. angustifolium, an arctic and temperate North American species, is also native in Galway and Kerry in Ireland. ”