Fl. forming a double triangle, 111mm wide; perianth segments 50mm long, roundish, very broad, blunt or slightly truncate at apex, mucronate, white, spreading, plane or with margins incurved, with midrib showing, of heavy substance; the inner segments narrower, scarcely mucronate; corona 15mm long, bowl-shaped, ribbed, brilliant greenish yellow 5A, mouth expanded, lightly frilled and lobed, with lobes overlapping. Slightly scented.