Fl. 110 mm wide; perianth segments broadly ovate, shouldered at base, blunt, vivid yellow, with greenish white at base and with slight white mucro, slightly reflexed, with margins minutely incurling, with midrib showing, of heavy substance, overlapping half; the inner segments narrower, more nearly spreading; corona funnel-shaped, angled, creamy white, with a band of vivid yellow at rim, mouth ribbed and a little flared, with rim dentate.