Fl. rounded, 96 mm wide; perianth and other petaloid segments in 3 whorls, broadly ovate, brilliant yellow with broad midrib showing, overlapping half; the outer whorl with prominent whitish mucro, spreading, plane or somewhat concave; the second whorl inflexed and more deeply concave; the center whorl very strongly inflexed, with margins tightly incurled; corona segments two-thirds the length of the petaloid segments and interspersed among them, darker in tone, frilled.