Fl. forming a double triangle, 100 mm wide; perianth segments broadly ovate, blunt, prominently mucronate, medium bright yellow, with stronger yellow towards base and a well-defined band of white at base, spreading, plane, regular, overlapping one-third to a half; the inner segments slightly twisted, rounded at shoulder; corona cylindrical, white, with a very narrow band of golden yellow at rim, mouth a little expanded, rim shallowly notched and slightly rolled.