Fl. 110 mm wide; perianth segments broadly ovate, shouldered at base, blunt, vivid yellow 9A, with greenish white at base lightly streaked with strong yellow-green, and with slight white mucro, slightly reflexed, a little concave, with pale midrib showing, of heavy substance, overlapping half; the inner segments a little more narrowly ovate, more nearly spreading, with margins somewhat wavy; corona funnel-shaped, smooth, darker in tone than the perianth segments and shading to at rim, mouth straight, wavy, with rim obscurely crenate.