About Acacia confusa

Acacia confusa is a perennial tree native to South-East Asia. Some local names for it are Acacia Petit Feuille, Small Philippine Acacia, Formosa Acacia (Taiwan Acacia) and Formosan Koa. It grows to a height of 15 m. The tree has become very common in many tropical Pacific areas, including Hawaii, where the species is considered invasive.

Common names

Chinese 相思樹. 假葉豆. 台灣相思. 松絲. 洋桂花. 相思. 相思仔. 細葉相思樹. 香絲樹.
Taiwanese Sīun si á.
Hakkanese Hiong si siū. Sióng sí su. Siòng sˋ shu2.
English Taiwan acacia.
Japanese そうしじゆ.
Aborigines Kainaunu (Bunun). Tyokoru (大武附近原住民). Tyokozi (Paiwan).

Scientific classification

Kingdom: Plantae
Division: Angiosperms
Class: Eudicots
Subclass: Rosids
Order: Fabales
Family: Fabaceae
Genus: Acacia


Acacia confusa wood has a density of about 0.75 g/cm³. In Taiwan, its wood is used to make support beams for underground mines. The wood is also converted to charcoal for family use. Acacia confusa is used in traditional medicine and is available from herbal medicine shops (草藥店) in Taiwan, but there has been no clinical study to support its effectiveness.

Acacia confusa contains high concentrations of psychoactive tryptamines in its root and trunk bark. It appears attractive for use in ayahuasca analogs, though at this point, experience with such preparations remains limited. Little research has been done, successful ayahuasca preparations and direct oral activity using the root bark and trunk bark have been reported.

Ayahuasca analogs prepared with Acacia confusa bark are known as Formosahuasca (after Formosa acacia, i.e., the beautiful acacia, presumably after Ilha Formosa, i.e., the beautiful island, the original Portuguese name for Taiwan), or alternatively as Chinahuasca or Asian Ayahuasca.

For educational and informational purposes only!

Guide to brew Formosahuasca

Here a report that the n-butanol-methanol extract obtained from Acacia confusa, referred as ACSB-M4, may serve as a potential protective agent for use in the management of patients with chronic HCV (hepatitis C virus) infection.

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