Fl. rounded, 100 mm wide; perianth segments very broad in outline, blunt or somewhat truncate, only slightly mucronate, opening white, becoming lemon yellow, a little reflexed, plane, smooth, with broad midrib showing, overlapping half or more; the inner segments a little narrower, square-shouldered at base; corona shallow bowl-shaped, ribbed, lemon yellow, with a broad band of pink at rim, mouth straight, split in places and overlapping, frilled, with rim dentate.