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Dipterocarpus sarawakensis Slooten.
by Wendy Yong Sze Yee
Newsletter
Dipterocarpus sarawakensis Slooten.
by Wendy Yong Sze Yee

Dipterocarpus sarawakensis Sloot. (Dipterocarpaceae) is distributed from Terengganu to Sarawak, Brunei and Kalimantan in Borneo. In Peninsular Malaysia, it is restricted to the lowland dipterocarp forest. This species is listed as Critically Endangered (CR) in the Malaysia Plant Red List due to habitat degradation.

In 2005, 50 trees were found in Compartmen 31 and 34 in Jerangau Forest Reserve (FR), Terengganu. Recommendations for conservation of the population were submitted to the Terengganu Forest Department. Following this, they have gazetted 63 ha as High Conservation Value Forest (HCVF) and Genetic Resources Area (GRA). The population is currently being monitored for flowering phenology, reproductive biology and studies associated with ex situ conservation.

In 2008, another population was found in Compartment 45, Jerangau FR by Ranger Saleh Endot from Terengganu Forest Department. Through a survey conducted in collaboration with FRIM, 63 trees were discovered and enumerated.

The species is an emergent tree that grows to 1 m diameter. It has a short petiole with short and dense indumentum, broadly obovate and obtuse leaves, with wavy margin. These diagnostic characters distinguish this species from other Dipterocarpus species.

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