Fl. 100mm wide, facing upwards; perianth and other petaloid segments in 3-4 whorls; the two outer whorls 35mm long, roundish, very broad, truncate, bright greenish yellow 5B with pale mucro, spreading, concave, with margins incurling, with midrib showing, creased and of heavy substance, overlapping half or more; the inner whorls shorter and narrower than the outer segments, successively more inflexed towards the centre, concave or folded inwards along midrib; corona segments one-third the length of the outer perianth segments and interspersed among the inner petaloid segments, yellowish orange (23B), folded and frilled. Strongly scented.