Ficus fistulosa Reinw. ex Blume, Bijdr. (1825)

Synonyms
Covellia subopposita Miq.
Covellia tuberculata Miq.
Ficus condensa King
Ficus curranii Merr.
Ficus fistulosa var. angustifolia Miq.
Ficus fistulosa var. cincta Hochr.
Ficus fistulosa var. lucbanensis (Elmer) Corner
Ficus fistulosa var. obliqua Miq.
Ficus fistulosa var. tengerensis (Miq.) Kuntze
Ficus grandidens Merr.
Ficus harlandii Benth.
Ficus lucbanensis Elmer
Ficus millingtonifolia Griff.
Ficus polysyce Ridl.
Ficus repandifolia Elmer
Ficus rubrovenia Merr.
Ficus tengerensis Miq.
Ficus tuberculata (Miq.) Miq.

Diagnostics
Understorey tree up to 20 m tall and 21 cm dbh. Stem with white sap. Twigs often hollow. Stipules ca. 10 mm long, glabrous. Leaves alternate, simple, penni- to tripli-veined, glabrous. Fruits ca. 10 mm diameter, yellow-brown, globose, fleshy figs placed in bundles along twigs and on the stem.

Description
Dioecious tree, up to 20 m, 21 cm diameter. Bark grey; inner bark yellowish white; latex pale yellowish buff. Twigs 0.3-0.8 cm thick, hollow. Stipules up to 1.5 cm long, caducous. Leaves spirally arranged or opposite, glabrous, coriaceous; ovate to lanceolate or elliptic to oblong, 8-25 x 2.5-12 cm, base rounded, sometimes asymmetric, margin entire, revolute, apex acute; midrib raised above; lateral veins 4-9 pairs, raised below, faint above, basal pair short; intercostal venation reticulate or subscalariform, visible on both surfaces; petiole 0.8-7 cm long, with subnodal gland. Syconia in clusters, axillary or borne on stem and branches, depressed globose, 1.5-2.5 cm diameter, ripening greenish yellow to pale yellow, base narrowed into a short stalk-like structure; peduncle 1-1.5 cm long; basal bracts 3, subtriangular, up to 1 mm long, persistent; internal bristles none. Tepals 2 or 3, fused, tubular or collar-like. Achenes minutely tuberculate. [from Tree Flora of Sabah and Sarawak]

Ecology
In undisturbed mixed dipterocarp to sub-montane forests up to 1700 m altitude. On hillsides and ridges with sandy to clay soils. Often along streams.

Distribution
From northeastern India and southern China to New Guinea.

Local names
Borneo: Ara, Buruni-buruni, Engkunoh, Engkuroh, Kara, Kayu ara.
China: shui tong mu.
Indonesia: Beunying.