Fl. rounded, 96 mm wide; perianth segments very broadly ovate, truncate, brilliant greenish yellow, with slight white mucro and a touch of white at midrib at apex, spreading, overlapping half or more; the outer segments overlapping one other; the inner segments roundish, less prominently truncate, a little inflexed, with margins slightly wavy; corona short, flared, loosely ribbed, a little darker in tone than the perianth, with deep green at base, mouth straight, deeply frilled.