| Name | Cratoxylon aborescens |
| Synonyms | Geronggang, Mulu, Serungang |
| native distribution | Brunei Darussalam, Indonesia, Malaysia, Myanmar, Singapore |
| Biology | 20-60m height, up to 90cm diameter, sometimes buttresses, |
| Ecology | fast growing tree, often in gaps and disturbed habitats; |
| Habitat | occuring in many habitat types (swamp/keranga/submontane/dipterocarp forests), also in over-logged forests; up to 1800m altitude |
| Wood | dark-red colour of heartwood, spawood (4-6cm) clearly demarcated and light pink, lustrous surface when planed; grain straight to interlocked, coarse texture; density ca. 540 kg/m3 (12% moisture content), non-durable, but easily impregnated; easy to dry; easy to work; APPLICATION: Veneer, light to medium construction (Derum timber for medium to heavy construction), interior joinery and panelling, blockboards, moulding, fiber or particle boards, furniture |
| Other Info | not listed for CITES; Derum timber is harder and heavier (e.g. C. maingayi) than Gerunggang (e.g. C. aborescens), both are trade names; potential for rehabilitation and restoration of degraded forests |
The heavyweight among building materials!