Fl. forming a double triangle, 104 mm wide; perianth segments very broadly ovate, blunt, slightly mucronate, greenish white, slightly inflexed, plane, glistening, overlapping half; the outer segments overlapping one another; the inner segments more narrowly ovate, with margins sometimes wavy; corona funnel-shaped, usually shorter than the perianth segments, lightly ribbed, yellow-white, with mouth flared and lightly frilled, rim crenate and narrowly rolled.