Fls 1-3 per stem, 75mm wide; perianth segments 40mm long, broadly ovate, blunt, truncate, prominently mucronate, greenish white, spreading to a little inflexed, concave, with margins a little incurved, smooth and of heavy substance, overlapping one-third to a half; the inner segments narrower, shouldered at base, less prominently mucronate, more strongly inflexed; corona 15mm long, the six segments split to base, forming two whorls of three, each closely overlying a perianth segment, forming an outer and an inner whorl of three, of the same width as the perianth segments, irregularly lobed, regularly ribbed, brilliant greenish yellow, lightly frilled.