Dillenia ovata Wall. ex Hook.f. & Thomson, Fl. Ind. 1: 70 (1855)

Synonyms
Dillenia crassisepala Martelli in Becc.
Dillenia eximia Miq.
Dillenia grandifolia Wall. ex Hook.f. & Thomson
Dillenia scortechinii (King) Ridl.
Wormia kunstleri King
Wormia scortechinii King

Diagnostics
Mid-canopy tree up to 40 m tall and 100 cm dbh. Often with stilt roots. Stipules absent. Leaves alternate, simple, penni-veined, petioles and leaf lower surface densely hairy, leaves very long, margin toothed. Flowers ca. 16 cm in diameter, yellow, placed in composed racemes. Fruits ca 6 cm diameter, dull yellow, fleshy indehiscent capsule with 1-2 seeds with aril.

Description
Tree, up to 40 m high and 1 m diam. but usually smaller, 6-12 m high and 30-40 cm diam., with rather knotted trunk and low-attached crown. Leaves ovate or elliptic, ca 18-25-nerved, 10-25 by 7-13 cm, on saplings ca 50-nerved, 30-60 by 14-18 cm, with rounded to obtuse, on saplings acute apex, rounded to acute, often unequal-sided base, and entire to obscurely dentate margin. Petiole ca 2.5-5 cm long. Underside of the leaf and petiole hirsute-tomentose. Flower ca 16 cm diam. Sepals 5, elliptic, 25-30 by 16-27 mm, the innermost ones the narrowest, the two outer ones densely villose outside, the third one with one glabrous margin, the inner ones densely villose on the central part only. Petals yellow, 6.5-7.5 by 5-6 cm. Stamens in 2 distinct groups, the outer ones, ca 450, 16-20 mm long, straight in bud, the inner ones, ca 25, 25 mm long, with their apex reflexed in bud. Carpels 8-12, usually 10, 6-7 by 2-2.5 mm with 20 mm long, yellowish white styles; each with ca 50 ovules. Fruits indehiscent, dull yellow, depressed globose, ca 4.5 cm high, 6 cm diam. including the enclosing sepals, which are ca 1.5 by 5.5 cm, at the base l.5 cm thick. Carpels ca 22 by 10 mm, each with 1-7 seeds in glutinous pulp. Seeds obovoid, 5 by 4 mm, black, glabrous, exarillate. [from Flora Malesiana]

Ecology
In undisturbed and secondary forests up to 200 m altitude. In swamp forest or alluvial sites, but also on common on dry places (ridges) with sandy soils.

Uses
The timber is used to make planks.

Distribution
Indochina into Peninsular Malaysia, Sumatra, Borneo. In Java cultivated only.

Local names
Borneo: Beriga, Entepung rimba, Kadjang, Ketang bajut, Jongong, Kayu pajan, Keruing paya, Markadjang, Pohu, Pru, Riga, Simpur, Suretang, Tempuru.