| 1 | Corolla bud densely pubescent all over; anther apex acute or shortly acuminate; fruit weakly torulose |
| 1' | Corolla bud glabrous, pubescent only on tube or pubescent on tube and only very sparsely on head; anther apex long acuminate; fruit strongly and distantly torulose |
| 2 | Leaves puberulent only in nerve axil domatia or glabrous; inflorescence axis delicate; fruit glabrous |
| 2' | Leaves puberulent all over beneath especially on venation; inflorescence axis robust; fruit pubescent |
