Fl. 105 mm wide; perianth segments broadly ovate in outline, blunt or rounded at apex, brilliant yellow, with slight white mucro, a little reflexed, concave, with margins sometimes incurling, overlapping half; the inner segments a little narrower, more nearly spreading; corona cup-shaped, straight-sided, ribbed towards mouth, slightly darker in tone than strong orange, flushed towards mouth with a darker tone, mouth straight, neatly frilled.