Streblus asper Health effects and herbal facts
Streblus asper is a tree known by several common names, including Siamese rough bush, khoi, serut, and toothbrush tree. It is a medium-sized tree native to dry regions in Thailand, India, Malaysia, and Vietnam.
In the Republic of the Philippines, it is commonly known as "bogta-e" or "bogtalay"
The leaves are 2 to 4 inches long, rigid, oval-shaped, irregularly toothed, and borne on small petioles. staminate flower heads are spherical with minute flowers. pistillate flowers have longer peduncles.
The tree has a number of uses. It has been important in papermaking in Thailand for seven hundred years. Virtually all of the ancient Thai documents still in existence are written on the bark of this tree. The Buddhist texts and official records from before the twentieth century in Thailand are known as khoi books. The paper is durable even in the local high-humidity climate. It does not burn easily and it is resistant to yellowing and insect damage. Today other fiber sources are used to make paper and khoi fibers are used primarily by artisans who produce paper using traditional techniques.
In Vietnam traditional woodworking uses the coarse texture of the leaves as natural sandpaper.
- China: China - Guangdong, Guangxi, Hainan, Yunnan
- Indian Subcontinent: Bhutan; India; Nepal; Sri Lanka
- Indo-China: Cambodia; Laos; Thailand; Vietnam
- Malesia: Indonesia; Malaysia; Philippines