Fl. forming a double triangle, 76mm wide, facing upwards; perianth segments 35mm long, ovate, blunt or truncate, slightly mucronate, brilliant greenish yellow, spreading, plane or with margins a little incurved, smooth and of membranaceous substance, overlapping one-third; the inner segments narrower, scarcely mucronate; corona 11mm long, bowl-shaped, ribbed, strong orange, mouth straight, wavy to lightly frilled, with rim crenate.