Combretocarpus rotundatus (Miq.) Danser
Teruntum batu (Indonesia); Perepat (Indonesia); Perapat paya (Malaysia); Keruntum (Malaysia); Perapat hutan (Brunei Darussalam); Keruntum (Brunei Darussalam); Balak bekatan (Brunei Darussalam); Marapat (Indonesia); Perapat-perapat (Sabah); Keruntum (Sarawak)
Combretocarpus motleyi Hook. f.
It is a medium-sized to fairly large tree up to 40 m tall, 1 m in diameter. The trunk base has sometimes small stilt-roots or ( in swampy or water-logged sites ) with mats of rust-brown " air roots " ( in drier sites ) or with short, slender, upright, roo
This monotypic genus is restricted to all types of peat-swamp forest throughout Borneo, Sumatra and Peninsular Malaysia. Larger trees occur in the wetter swamp forests.
It is confined to peat swamps and infertile sandy soils of Sarawak, Brunei, Sabah, Kalimantan and the Malay Peninsula.
Wood diffuse porous. Tangential diameter of vessel lumina 200 micras or more (large). Colored deposits in heartwood vessels. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervesse Occasionally apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Occasionally prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 cells per parenchyma strand. Over 9 cells per parenchyma strand. Axial parenchyma band 4 to 10 rays per mm (medium). Rays less than 4 per mm (rare). Rays of two distinct sizes. Ray height more than 1 mm. Occasionally larger rays more than 4 seriate. Occasionally sheath cells. Prismatic crystals in radial alignment in procumbent ray cells (chamber Fibers very thick walled. Fibers with distinctly bordered pits.
The sapwood is whitish, merging into reddish-brown heartwood.
The grain is straight or interlocked.
The wood is typically coarse in texture.
Freshly-cut surfaces are glossy.
It is only moderately durable in the tropics when exposed to the weather.
This species is reported to have growth stresses.
The sapwood is permeable, the heartwood is resistant to preservatives.
Ease of Drying: Seasoning is slow but its properties are rated as good. Drying Defects: There is a risk of warping for thin boards.
The timber has a tendency to spring during sawing.
The workability of this species is reported to be easy to fair.
This species is reported to have a poor nailing behavior.
It is reported to have a good to fair response to hand tools.
EXTERIOR GENERAL, poles, stakes posts, crossties, HOUSING GENERAL, flooring, panelling, FURNITURE AND CABINETS, PLYWOOD AND VENEER, SPORTS, TOOLS, agricultural tools, PACKING, NAVAL CONSTRUCTION, boats