Vatica umbonata (Hook.f.) Burck, Ann. Jard. Bot. Btzg. 6 (1887)

Latin for 'with button in the centre', referring to the fruit.

Pachynocarpus verrucosus Heim
Pachynocarpys umbonatus Hook.f.
Vatica acrocarpa Sloot
Vatica blancoana Elm.
Vatica cupularis Sloot
Vatica ramiflora Sloot
Vatica verrucosa Burck

Mid-canopy tree up to 40 m tall and 66 cm dbh. Stem with resin. Stipules ca. 4 mm long. Leaves alternate, simple, penni-veined, glabrous. Flowers ca. 17 mm in diameter, white-yellow, placed in panicles. Fruit ca. 21 mm long, reddish-brown, wingless.

In undisturbed mixed dipterocarp or peat swamp forests up to 300 m altitude. Mostly on alluvial sites and in swamps, but also found on hillsides and ridges, and even in coastal areas. In secondary forests usually present as a pre-disturbance remnant tree.

The timber is used.

Peninsular Malaysia, Sumatra, Borneo (Sarawak, Brunei, Sabah, Central- and East-Kalimantan), Philippines.

Local names
Borneo: Resak, Resak ayer, Resak batu, Resak gunung, Resak labuan.