Antiaris toxicaria var. toxicaria

  

Antiaris toxicaria var. toxicaria, commonly known as the upas tree, is a species of tree in the family Moraceae. It is native to tropical regions of Southeast Asia, including Indonesia, Malaysia, and the Philippines. The tree is particularly noted for its toxic properties and historical significance.

Key Characteristics:

Toxicity: The upas tree is famous for its poisonous sap, which has been traditionally used in Southeast Asia as a means of hunting. The sap contains compounds that can cause severe reactions, including paralysis and death if consumed or if it comes into contact with open wounds. The toxic sap is primarily derived from the bark and latex.

Appearance: The upas tree is a large tree that can grow up to 30 meters (about 100 feet) in height. It has large, glossy leaves and a thick, rough bark. Its flowers are small and greenish-yellow, typically not very showy. It also produces a fig-like fruit.

Habitat: This species thrives in tropical rainforests and prefers well-drained, fertile soils. It is typically found in lowland areas and can grow in dense forest environments.

Cultural and Historical Significance: The tree has been part of local folklore, especially in Indonesia. It was once believed that the tree's toxic effects could kill animals from a distance, leading to the myth that the tree had an invisible poison cloud. Traditional hunters would use the tree’s sap to poison arrows or blow darts to catch game.

Modern Use and Concerns:

While the tree's toxicity is still acknowledged, the upas tree is not commonly used in contemporary medicine or industry due to the dangers associated with its sap. However, the upas tree is of interest to researchers studying plant toxins and their effects.