This perennial has an upright arching foliage and forms a clump. It hsa narrow sword-shaped dark green leaves and the yellow star-shaped flowers appear in clusters during spring on tall stems above the foliage. 

Hardiness zones 8 to 10 

Sisyrinchium iridifolium is naturally found from Brazil to Chile in South America, growing in well-drained stony soils in a open sunny position and is frost tolerant but drought tender. 

This perennial is easily grown for its tufted habit and yellow flowers. It is planted in garden beds as a border or as a specimen and is used in rock gardens or containers. It establishes from division in 1 to 2 years and is also planted in roof gardens or perennial borders in small or herb gardens. ID 1499

Sisyrinchium (si-si-RING-kee-um) iridifolium (er-ee-dee-FOL-ee-um)

Iridaceae (eye-rid-AY-see-ee)
Iris Family