KEY TO THE SPECIES

1Stipules deltoid, acute, c. 1 mm long; petiolar gland crater-shaped, up to 9 mm long and 5 mm high
1'Stipules filiform, 1-4.5 mm long; petiolar gland 0.5-1.5(-3.5) mm in diameter
2Petiolar gland at about the middle of the petiole
2'Petiolar gland situated at the insertion of the proximal pair of pinnae. Vanuatu (S part) (see note under S. novoguineensis)