Fl. forming a double triangle, 99 mm wide; perianth segments very broadly ovate, obscurely truncate, with slight white mucro, vivid yellow, spreading, somewhat concave, with margins incurling at apex, smooth, regular, overlapping half; inner segments more narrowly ovate; cup is short broad funnel-shaped, ribbed, opening self orange-red, becoming yellow-orange at base, mouth straight, split in places and overlapping, frilled, with rim minutely crenate.