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This study was conducted at the Tranum Forest Reserve, Raub, Pahang to determine the community structure, species diversity and biomass of trees in the area. Four study plots, each measuring 25 m x 20 m, were established at the study site, which covered a total area of 0.2 ha. All trees with diameter at breast height (DBH) of 5 cm and above were measured and recorded. A total of 175 trees was enumerated in the study plots, comprising 106 species and 79 genera from 40 families. The largest family was Lauraceae, represented by 11 species from six genera, followed by Myrtaceae with eight species from one genus. Tree species diversity of the study area was high, as reflected by a Shannon Diversity Index (H') value of 4.49 (Hmax = 4.66). Margalef Richness Index (R') and Shannon Evenness Index (E) showed values of 20.33 and 0.84, respectively. The most important family, based on the highest Family Important Value Index (FIVi), was Dipterocarpaceae, with a value 17.31%. Shorea platyclados was the most important species with Important Value Index (IVi) of 17.04%. The tree density of the study area was 875 indidivuals per hectare (ind/ha), with Lauraceae being the densest family at 85 ind/ha. Vitex gamosepala was the densest species at 40 ind/ha. The total basal area of trees was 66.23 m²/ha, with Dipterocarpaceae showed the highest basal area of 31.69 m²/ha and Shorea platyclados had the highest basal area of 31.69 m²/ha at species level. The total biomass of trees was estimated at 1,307.56 t/ha, of which the above ground biomass and the below ground biomass were 1,091.33 t/ha and 216.23 t/ha, respectively. Dipterocarpaceae contributed the highest biomass with an estimate of 743.83 t/ha and Shorea platyclados showed the highest biomass at species level with 743.83 t/ha. [ABSTRACT FROM AUTHOR]

The species of Archidendron pahangense (Kosterm.) I.C. Nielsen (Fabaceae) is an endemic species in Peninsular Malaysia known only from Pahang and Selangor state. This species was also recorded in Gunung Rabong, Kelantan. This species was reported in Fraser Hill, Pahang, whereby common in the Pine Tree Hill. This species was also observed in Semangko Tambahan Forest Reserve, Selangor. Fertile specimens were collected in 1923, 1938, 1954, 1966 and 1967. [ABSTRACT FROM AUTHOR]

This paper lists the Burseraceae species recorded in Sungai Menyala Forest Reserve, Port Dickson, Negeri Sembilan. Based on specimens deposited in the Herbarium of Forest Research Institute Malaysia (KEP) and Herbarium of Universiti Kebangsaan Malaysia (UKMB), a total of 27 taxa were recorded. However, in the recent survey during the Scientific Expedition of Sungai Menyala 2022, only 13 taxa were found viz. Canarium apertum, C. littorale f. littorale, C. pilosum, C. patentinervium, Dacryodes costata, D. rugosa, Santiria apiculata var. apiculata, S. apiculata var. rubra, S. griffithii, S. laevigata f. laevigata, S. oblongifolia, S. rubiginosa var. rubiginosa and S. tomentosa. Santiria laevigata f. laevigata is a form commonly found as the medium to big tree. At the seedlings level, the following taxa, viz. Dacryodes costata, D. rugosa, Santiria apiculata var. apiculata and S. rubiginosa var. rubiginosa are common. However, the seedlings of Canarium patentinervium and C. pilosum are quite rare. Two species are endemic to Peninsular Malaysia, namely Dacryodes longifolia and D. puberula are found. Only a single stem of Santiria laevigata f. laevigata bear fruits during the recent survey. [ABSTRACT FROM AUTHOR]