Siphonodon celastrineus Griff.

Tree up to 35 m by 90 cm ø, very rarely with buttresses up to 1-1.5 m high (fide KOSTERMANS 13472 & 13487). Leaves chartaceous to subcoriaceous, sometimes coriaceous, olivaceous or grey-greenish when dry, ovate-oblong or elliptic-oblong to-lanceolate, 4-23 by 3.5-9.5 cm; base cuneate or round; apex acute to acuminate; margin usually crenate, sometimes remotely or obscurely crenulate, rarely entire; nerves 6-10 pairs; petiole 0.5-1 cm. Inflorescences cymose or umbelliform, (1-)few(-∞)-flowered. Peduncle 0.5-1.5 cm. Pedicels 5-11 mm. Flowers cream-white; calyx and petals sometimes containing reddish brown cells or spots in the tissue. Calyx lobes reniform or subrotund, 1-2 mm long. Petals ovate, 2¼-3½ by 1.75-2.5 mm, obtuse. Stamens c. 1 mm; filaments flat, united at the lower 1/2 or near the base; anthers usually perpendicularly bent inward in bud. Pistillar body usually ± semi-globose, sometimes +-short conical, occasionally with 5 radiating ridges on the upper surface. Fruit green or yellowish green, broad-ellipsoid, globose, sometimes slightly obovoid or ± pyriform, 3-6½ by 2-6 cm.

In forests, from the lowland up to 1375 m; found on limestone in E. Kutai and Java, also collected on level clay soil in W. New Guinea.In Sula Sanana I. (West Moluccas) it occurs on limestone slopes along the Wai Bussa near Fowata between 40-90 m as a dominant in forest, associated with Vitex cofassus, Pangium edule, Intsia (scattered), Pometia, Ficus, and Nauclea (BLOEMBERGEN, 1939).

Plants can be grown from seeds.