Fl. forming a double triangle, 110mm wide, deep yellow; perianth segments 45mm long, ovate, blunt, with whitish mucro, spreading, plane, with midrib showing, of membranaceous substance, overlapping half; the inner segments narrower, shouldered at base, corona 50mm long, cylindrical, angled, mouth straight, wavy to lightly frilled, with rim notched and
narrowly flanged.