Fl. rounded, 105 mm wide; perianth segments very broad, somewhat truncate, mucronate, pure white, slightly reflexed, concave, overlapping half; the inner segments narrower, less noticeably mucronate, sometimes inflexed towards apex, with margins wavy; corona long cup-shaped, constricted near mouth, pinkish yellow, with green at base and a broad band of orange-pink at rim, rim sometimes slightly flanged. Sunproof

Named after a cathedral in Paris.