Fl. forming a double triangle, 104mm wide; perianth segments 43mm long, very broadly ovate, blunt, mucronate, vivid yellow, spreading, plane or with margins very slightly incurved, smooth and of membranaceous substance, overlapping half; the inner segments significantly narrower; corona 28mm long, split to base, the six segments opposite and closely overlying the perianth segments, forming an inner and an outer whorl of three, each as wide or wider than the perianth segments, vivid yellow, lobed and ribbed, with margins wavy, overlapping at shoulder. Sweetly scented.