Fl. forming a double triangle, 109 mm wide; perianth segments broadly ovate, blunt, brilliant greenish yellow with prominent white mucro, spreading, plane, smooth and of heavy substance, overlapping half; the inner segments only a little narrower, square-shouldered at base, very slightly inflexed; corona cylindrical, lightly ribbed towards mouth, vivid yellow mouth straight, even or a little frilled, with rim obscurely crenate. Sweetly scented.