| 1 | Petiole provided with glands. |
| 1' | Petiole without glands. |
| 2 | Glands in the upper half of the petiole; laminal glands not (only) approximate to the nerve bases. |
| 2' | Glands in the lower ¼ of the petiole; laminal glands rather approximate to the nerve bases. Samoa. |
| 3 | Plant glabrous; sometimes with minute patio-lar glands. Norfolk I. |
| 3' | Plant (incl. ovary) finely pubescent. Australia. |
