Fl. rounded, 90 mm wide; perianth and other petaloid segments in four whorls, very broad, rounded at apex and somewhat truncate, not apparently mucronate, dark yellow, concave, regularly arranged, overlapping half or more; the outer whorl spreading, the inner whorls a little inflexed and not much shorter, the center whorl strongly inflexed and with margins deeply incurved; corona segments shorter than the petaloid segments and interspersed among them, orange.