Fl. forming a double triangle, 80mm wide; perianth segments 31mm long, roundish, very broad, blunt, yellow, with slight white mucro, spreading, plane, smooth and of membranaceous substance, overlapping half or more; the inner segments narrower, more nearly ovate, somewhat shouldered at base, with midrib showing; corona 29mm long, funnel-shaped, smooth, mouth straight and lightly frilled, with rim crenate