Fl. 90 mm wide; perianth and other petaloid segments very broadly ovate, blunt, light greenish yellow, with margins brilliant greenish yellow, overlapping half or more; the outer whorl spreading, a little concave, smooth; the inner whorl slightly shorter, strongly inflexed, creased, with margins incurled; corona segments two-thirds the length of the inner whorl and regularly arranged beneath it, vivid yellow, with margins wavy or frilled and rim minutely ruffled.