Fl. forming a double triangle, 112 mm wide; perianth segments broadly ovate, blunt, mucronate, a little inflexed, slightly concave, with margins minutely incurling, overlapping half; the inner segments a little narrower, less prominently mucronate, reflexed in upper half, with margins deeply incurved; corona cylindrical at base, flared from mid-point, lightly ribbed, with mouth even, rim flanged and irregularly crenate.