Fl. rounded, 102 mm wide; perianth segments very broad, squarish at apex, slightly mucronate, pure white, a little reflexed, concave at apex, very smooth, overlapping half or more; the inner segments narrower, roundish at apex, not noticeably mucronate, inflexed at base, reflexed at apex; corona very shallow bowl-shaped, ribbed, opening lemon yellow, becoming white, with green or yellow-green at base and a very broad band of golden yellow at rim.