Characteristics of Resak Irian Tree (Vatica rassak) in the Wild

Vatica rassak
Resak Irian or Rasak (Vatica rassak) is a tree in the family Dipterocarpaceae, native to Maritime Southeast Asia (Kalimantan, Java, Maluku Islands, Sulawesi, New Guinea, and the Philippines). Habitat along rivers and in lowland dipterocarp forests, at elevations up to 400 m asl).

Resak Irian is a tree related to several trees in its genus which is classified as rare and protected, including Kokoleceran (Vatica bantamensis) which is only found in Banten, West Java, and Resak Rawa (Vatica pauciflora) endemic to Sumatra, Java, and Bangka.

 

Characteristics of Resak Irian Leaf

Vatica rassak Leaf
Source: flickr.com/Horace Tan

The leaves are green, narrowly elliptical, simple arranged and alternate, glabrous surface, different triangular stipules about 15-30 cm long.

 

Characteristics of Resak Irian Flower

Vatica rassak Flower
Source: flickr.com/Jake Teo

The flowers are located in inflorescence panicles and are white or cream in color.

 

Characteristics of Resak Irian Fruit

Vatica rassak Fruit
Source: flickr.com/Cerlin Ng

Fruit The fruit is brownish-green, square in shape, about 4 cm long.

 

Characteristics of Resak Irian Tree

Vatica rassak Tree
Source: flickr.com/Jake Teo

Resak Irian can grow into a large tree with a height of about 35 meters and a trunk diameter of 70 cm. The trunk has a sticky resin that comes out of the tree when it is injured.

This tree grows close to the water and is often found along streams and swamps. Sometimes on hillsides or mountains, on sandy soils, on calcareous soils, and in secondary forests.

 

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