Observations
A small to medium-sized tree, up to 30 m tall with cylindrical, often sinuate and low-branched bole up to 60 cm in diameter and small buttresses; leaves elliptical, 6—11 cm 3—5 cm, with 7—9 pairs of secondary veins, glabrescent, petiole short, 5—11 mm long; inflorescences up to 14 cm long; flower buds up to 12(—20) mm long; nut subglobose, up to 6 mm long, surrounded by 2 longer and 3 shorter fruit calyx lobes free to the base. Two subspecies are distinguished: subsp. mangachapoi (synonyms: Vatica patula Sym., Vatica reticulata King non (Thwaites) A.DC.), which is common, especially on dry ridges up to 800 m altitude throughout the range of the species, and occurs also on podzols in kerangas (heath forest), and shallow peats and white sand in Borneo; subsp. obtusifolia (Elmer) P. Ashton (synonym: Vatica obtusifolia Elmer) which differs in its smaller, thickly coriaceous, more obtuse leaves and smaller inflorescences, and which occurs very local in the Philippines (Palawan) and Sabah on rocky places in the lowland. The wood is heavy, with density of 690—1175 kg/m3 at 15% moisture content. See also the table on wood properties.
Selected Sources
[30]Ashton, P.S., 1964. A manual of the dipterocarp trees of Brunei State. Oxford University Press, London. xii + 242 pp.
[89]Browne, F.G., 1955. Forest trees of Sarawak and Brunei and their products. Government Printing Office, Kuching. xviii + 369 pp.
[100]Burgess, P.F., 1966. Timbers of Sabah. Sabah Forest Records No 6. Forest Department, Sabah, Sandakan. xviii + 501 pp.
[175]de Guzman, E, R. M. Umali, & E.D. Sotalbo, 1986. Guide to Philippine flora and fauna. Vol. 3: dipterocarps, non-dipterocarps. Natural Resources Management Center, Ministry of Natural Resources & University of the Philippines, Manila. xx + 414 pp.
[265]Garcia, P.R., Castillo-Borboran, L. & Dionglay, M.G., 1983. Germination of narig (Vatica mangachapoi Blanco) and red lauan (Shorea negrosensis Foxw.) seeds in various media. Sylvatrop 8: 133–137.
[425]Lim, S.C., 1982. Malaysian timbers – resak. Malaysian Forest Service Trade Leaflet No 62. Malaysian Timber Industry Board, Kuala Lumpur. 9 pp.
[472]Medrano, R.N., et al., 1980. Shrinkage of some Philippine woods. Forpride Digest 9(1): 7–18.
[484]Meniado, J.A. et al., 1975–1981. Wood identification handbook for Philippine timbers. 2 volumes. Government Printing Office, Manila. 370 & 186 pp.
[497]Monsalud, M.R. & Tamolang, F.N., 1969. General information on Philippine hardwoods. Philippine Lumberman 15(7): 14–38.
[578]Research Institute of Wood Industry, 1988. Identification, properties and uses of some Southeast Asian woods. Chinese Academy of Forestry, Wan Shou Shan, Beijing & International Tropical Timber Organization, Yokohama. 201 pp.
[579]Reyes, L.J., 1938. Philippine woods. Technical Bulletin No 7. Commonwealth of the Philippines, Department of Agriculture and Commerce. Bureau of Printing, Manila. 536 pp. + 88 plates.
[628]Smitinand, T., Santisuk, T. & Phengklai, C., 1980. The manual of Dipterocarpaceae of mainland South-East Asia. Thai Forestry Bulletin 12: 1–110.
[677]Symington, C.F., 1941. Foresters' manual of dipterocarps. Malayan Forest Records No 16. Forest Department, Kuala Lumpur. pp. xliii + 244.
[748]van Steenis, C.G.G.J. & de Wilde, W.J.J.O. (Editors), 1950–. Flora Malesiana. Kluwer Academic Publishers, Dordrecht, Boston, London.