Fl. rounded, 92 mm wide; perianth and other petaloid segments in more than three whorls, regularly arranged opposite one another, decreasing slightly in size towards the center, brilliant greenish yellow; the three outer whorls broadly or very broadly ovate, blunt, with white mucro, a little concave; the outer whorl spreading, the second and third whorls a little inflexed; the whorls at center sharply inflexed, with margins tightly infolded; corona segments in several whorls, opposite and a little more than half as long as the petaloid segments and interspersed among them, broad, vivid yellow, tinged with a darker tone at rim, frilled.