Fl. forming a double triangle, 104mm wide; perianth segments 43mm long, roundish in outline, very broad, blunt at apex, vivid yellow, with pale mucro, spreading, plane or with margins very slightly incurved, smooth and of heavy substance, overlapping half; the inner segments narrower, shouldered at base, less prominently mucronate; corona 36mm long, funnel-shaped, smooth, vivid yellow, mouth narrowly flared and slightly wavy, with rim entire.