| 1 | Corolla yellowish |
| 1' | Corolla red |
| 2 | Leaf blade elliptic-oblong, 13-50 x 4.5-15 cm, caudate-acuminate at apex; panicle borne on peduncle of 9-14.5 cm long; calyx lobes narrowly triangular, 2.5-3.75 x 1.5 mm |
| 2' | Leaf blade ovate-oblong, 6-11 x 2.2-5.5 cm, acute or long acuminate at apex; panicle borne on peduncle of 1.5-5 cm long; calyx lobes subulate, 5-6 x 1 mm |
