Fl. forming a double triangle, 115 mm wide, facing up; perianth segments broadly ovate, shouldered at base, blunt, brilliant greenish yellow, with greenish white at base and with white mucro, spreading, plane, smooth and of heavy substance, overlapping half; the inner segments more narrowly ovate, with margins a little wavy; corona funnel-shaped, short, lightly ribbed, creamy white shading to light greenish yellow at rim, mouth straight, wavy, with rim dentate.