Fruits 2.2-3 cm long.
Asia-Tropical, Batanta I present, Bird's Head present, Papua Barat present
Malesia: Papua Barat (Bird's Head, Batanta I.).
Var. robusta is a form similar to var. petiolaris but coarser in all aspects: leaves, flowers, and fruits are larger. It superficially resembles H. tuberculata, which differs in the generally shorter petioles, and the androecium with the anthers not strongly inflexed into the cavity.