Fl. forming a double triangle, 84mm wide; perianth segments 31mm long, ovate, truncate or blunt, yellow, with white at base and pale mucro, spreading, plane, with margins recurved, with midrib showing, of heavy substance, overlapping one third; the inner segments narrower, scarcely mucronate; corona 29mm long, funnel-shaped, smooth, opening self buff white, maturing to white with a broad band of yellow at rim, mouth straight and lightly frilled, with rim dentate.