Our future fruiters

Artocarpus rigidus Blume, Bijdr. (1825)
Latin for "stiff, or rigid", referring to the spines on the fruit.
diagnostics
Tree with abundant white sap. Stipules surrounding the branches, leaving a circular scar during the fall. Leaves alternate, simple, with densely hairy lower surface. Fruit placed on branches, c. 13 cm in diameter, thorny, dull orange, with seeds placed in orange flesh.
The description
Tree up to 47 m tall, 90 cm in diameter, with buttresses up to 3 m high. Bark dark gray, smooth, fissured to scaly. Twigs 2-6 mm thick, smooth or rough, densely or sparse, hispid-pubescent with reddish-brown hair. Stipules amplexicaul, ovate or lanceolate, acute, 0.5-3 cm long, hispid-pubescent with yellow to reddish brown hairs. Leaves simple, spirally arranged, upper surface slightly hairy, lower surface densely rough-hairy; elliptical to ovate, obovate or oblong, 9-32 x 4-10 (-15) cm, cuneiform to rounded base, margin weakly toothed towards the apex, acute apex; median vein elevated above; lateral veins 9-20 pairs, raised below, flat or sunk above; intercostal scalariform or reticulate venation, raised below, very pale above; petiole 1-3 cm long. Leaves of lobed juvenile trees. Solitary, axillary inflorescences; bracts with peltate upperparts c. 0.3 mm in diameter, briefly ciliated; peduncle 0.2-0.6 cm long, densely hairy. Obovoid to subglobose male head, 1.3-2 cm in diameter; perianth tubular, c. 1 mm long, short bilobed, finely hairy; thin filaments, cylindrical, globular anthers, c. 0.1 mm long. Female heads with deciduous bracts, pubescent and peltate; female flowers with simple exserted styles. Globular parasitic, up to 13 cm in diameter, dull orange, strongly spiny surface by narrow, rigid, tapered, acute, hispid-pubescent processes 7-9 x 2 mm; pulp around the orange fruit, fleshy, sweet; peduncle up to 4 cm long. [from Flora Tree of Sabah and Sarawak]
Ecology
In undisturbed mixed dipterocarp forests with disturbances up to 1000 m altitude. On hillsides and ridges, but also on alluvial sites and peat bogs. On sandy to clay soils, but also on limestone.
Uses
Grown for the sweet edible pulp surrounding the seeds. The wood is classified as beruni or selangking and is used to make beams, furniture and boats.