Stem short or up to 300 mm long. Basal leaf glabrous, 1-3(-4) mm wide, often with wide grooves. Bracts 12 mm or longer, the inner membranous. Flowers 25-40 mm, sulphur-yellow, cream or white, rarely blue. Perianth tube 4-7 mm long; segments 15-30 mm long. Style 10-15 mm.