Fl. 95 mm wide; perianth segments broadly ovate, blunt, fairly prominently mucronate, greenish white, spreading or a little reflexed, somewhat creased, overlapping half or more; corona split to base, the six segments two-thirds the length of the perianth segments, alternate to them and more narrowly ovate, sometimes two- or three-lobed, with yellow at base and in a broad longitudinal band at midrib flecked with orange, white at margins, the margins wavy or incurling and sometimes twisted, overlapping.

'White Butterfly#'