Fl. rounded, 101mm wide; perianth segments 45mm long, very broadly ovate, rounded at apex, mucronate, brilliant greenish yellow 2D, a little paler long midrib, very slightly reflexed, shallowly concave, smooth and of heavy substance, overlapping half or more; the inner segments narrower, spreading, scarcely mucronate; corona 14mm long, disc-shaped, ribbed, vivid yellow 12A, mouth expanded and frilled, with rim dentate. Mid-season