Fl. 105 mm wide; perianth segments very broad in outline, blunt or squarish at apex, mucronate, slightly reflexed, plane, smooth and of heavy substance, overlapping half; the inner segments narrower, square-shouldered at base, more nearly spreading, with margins sometimes wavy or incurled; corona shallow bowl-shaped, very broad, lightly ribbed, bright yellow, with a band of reddish pink at rim, mouth split in places and overlapping, wavy, with rim crenate.