Fl. 115 mm wide; perianth segments broadly ovate, blunt, brilliant yellow with slight white mucro, spreading, concave at apex, smooth and of heavy substance, overlapping half; inner segments more narrowly ovate, slightly inflexed at base, reflexed in upper half, a little creased; corona funnel-shaped, smooth, brighter in tone than the perianth segments, mouth flared, ribbed, loosely frilled, with rim crenate.