Fl. rounded, 86 mm wide; perianth segments ovate, blunt, opening deep yellow, becoming amber yellow near to orange, spreading, plane, smooth and of heavy substance, overlapping; the inner segments a little inflexed; corona cylindrical below, a little flared above, slightly ribbed, opening deep yellow, becoming russet golden yellow, maturing to amber yellow, mouth straight or a little flared, with rim notched and crenate.