Leaves to 80 cm long, 9-14 mm wide with thickened midrib. Stem sparsely branched, 80-120 cm long. Flowers 5-6 cm wide, pale yellow; outer perianth segments horizontal, 35 mm long, with a black hairless signal patch edged orange; late spring to summer. Style branches 8-10 mm long, pale yellow.
Source: (2005). Iridaceae. In: . Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.