Stem to 60 cm tall, unbranched, winged. Leaves basal, shorter than stems, 4-6 mm wide. Spathes almost equal. Flowers 3-7, bright yellow with dark veins, 25-30 mm wide, summer. Segments oblong, acute, 12-18 mm long. Syn. S. boreale (Bicknell) Henry, S. brachypus (Bicknell) Henry.

Vancouver to California.

Source: Cooke, D. (2005). Iridaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.