Fl. 100mm wide; perianth segments 37mm long, very broadly ovate in outline, truncate to blunt at apex, slightly mucronate, white, spreading, plane or with margins a little incurved, smooth and of heavy substance, overlapping one-third; the inner segments much narrower, shouldered at base, scarcely mucronate; corona bowl-shaped, 10mm long, broadly ribbed, lemon yellow, with green at base and a broad band of deep reddish pink at rim, mouth flared and lightly frilled, with rim shallowly notched and crenate.