Fls 2-3 per stem, varying in size, the largest about 70 mm wide; perianth segments sometimes more than six in number, broadly ovate, blunt or squarish at apex, prominently mucronate, brilliant greenish yellow, with a broad band of white at base of some mature flowers, spreading, with margins incurling, overlapping half; the inner segments sometimes inflexed and twisted; corona shallow funnel-shaped, finely ribbed, opening yellow, becoming white, with mouth straight or a little flared, rim crenate and sometimes rolled. Scented.