Fl. forming a double triangle, 109mm wide; perianth segments 45mm long, broadly ovate, blunt, greenish yellow 5B, touched white at base, with pale, slight mucro, spreading, plane or with margins somewhat incurved, smooth and of membranaceous substance, overlapping half; the inner segments narrower, shouldered at base; corona 35mm long, narrow funnel-shaped, smooth, white, with a band of vivid yellow 9A at rim, mouth broadly ribbed, straight and wavy or lightly frilled, and lobed, with rim entire.