Fl. rounded, 104 mm wide; perianth segments very broadly ovate, blunt, only very slightly mucronate, brilliant yellow, spreading, slightly concave, with margins incurling at apex, smooth and of thick substance, overlapping half or more; the inner segments more narrowly ovate, square-shouldered at base, a little inflexed; corona cup-shaped, vivid orange, with mouth straight, minutely frilled.