Characteristics of Bayur Tree (Pterospermum javanicum) in the Wild

Pterospermum javanicum

Bayur (Pterospermum javanicum) is a type of tree that produces good quality wood. This tree which usually grows in the lowlands is also known by other names in each area, such as Cayur, Wayur, Bayor, Bayok, Bayuk, Litak, Wadang, Walang, Phenjur, Bolang, Buli, Damarsala, and Teunggi Leuyan.

Bayur is known to spread widely throughout the tropical world, from southern India, Central America, and Brazil.

In trade, bayur wood from Indonesia includes several other species, especially Pterospermum celebicum and Pterospermum diversiform.

Bayur trees are inhabitants of secondary forests below 1,000 m asl. It is not uncommon for the trees to be found in riverside and coastal forests.

The seeds spread with the help of the wind. It grows independently in wild gardens or empty fields. If the bayur tree grows on agricultural land, it is usually allowed to live to a large extent to harvest its valuable wood.

Although commonly found in moist, non-stagnant soils, bayur also grows well on dry soils in tropical forests, it is also known to live in clay, sandy, or loamy soils. His preferred climate is humid, wet to slightly dry.

Bayur wood is pale red, pink, light brown, purplish, or violet. The weight of the wood is put into class III strong wood.

Bayur wood is easy to shape, even though the texture is a bit rough, but after being processed by wood and furniture craftsmen, the resulting wood surface is generally smooth and shiny. Bayur wood is also easily polished and is often used
as veneer/plywood.

In terms of durability, bayur wood is in class IV-V (less durable), but its resistance to wood rot is class II-III.

Characteristics of Bayur Leaf

Pterospermum javanicum Leaf

The leaves are single, alternate, short-stemmed 3-6 mm. Each leaf blade is oval to lanceolate about 4-14 x 2.5-7 cm, with a tapered tip and asymmetric base. The upper side of the leaves is bright green, while the underside of the leaves has brownish down hair, and has three leaf bones at the base.


Characteristics of Bayur Flower

Pterospermum javanicum Flower

Bayur flower about 6 cm long, yellow, and smooth hair.


Characteristics of Bayur Fruit

The fruit is a cylindrical box 5-13 x 2-5 cm, when young it is fluffy and then bald when ripe. The seeds are many and have wings.


Characteristics of Bayur Trees

Pterospermum javanicum Tree

Bayur can grow as a large tree with a height of up to 45 meters and a trunk diameter of 1 meter.


The wood of the bayur tree (Pterospermum javanicum) is used for its good quality, and therefore it is one of the important types of wood besides Ulin (Eusideroxylon zwageri), Rosewood (Dalbergia latifolia), or Instia (Intsia bijuga).

Bayur wood is often used for building construction such as houses, boats, beams and boards, and even for building bridges. Bayur wood is also often used in the manufacture of furniture and household utensils.

In ancient times, bayur bark was traded as a substitute for the expensive Soga bark (Peltophorum pterocarpum). This bayur bark is known locally as Kulit Kayu Timor.


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