Fl. forming a double triangle, 103 mm wide, white; perianth segments very broadly ovate, blunt, only very slightly mucronate, a little inflexed, concave at apex, or with margins incurling, smooth and of heavy substance, overlapping half; the inner segments more narrowly ovate, square-shouldered at apex, with apex somewhat rounded; corona funnel-shaped, smooth, with deep green at base, mouth widely flared, wavy, with rim only minutely notched.