Fl. forming a double triangle, 87mm wide, slightly facing upwards; perianth segments broadly ovate, truncate, yellow with slight pale mucro, spreading, plane, with margins narrowly incurling, smooth and of membranaceous substance, overlapping half; the inner segments narrower, shouldered at base, scarcely mucronate; corona 26mm long, narrow funnel-shaped, angled, mouth broadly ribbed, lightly frilled and shallowly lobed, with mouth crenate