Acacia simplex is a perennial climbing tree native to islands in the western part of the Pacific Ocean as far east as Savaii

Savai'i

Savaii is the largest and highest island in Samoa and the Samoa Islands chain. It is also the biggest landmass in Polynesia outside Hawaii and New Zealand. The island of Savai'i is also referred to by Samoans as Salafai, a classical Samoan term used in oratory and prose...

. It is also found in Argentina

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

. This tree grows up to 12 m in height.

There is no common English name, but it is called tatakia in Fiji

Fiji

Fiji , officially the Republic of Fiji , is an island nation in Melanesia in the South Pacific Ocean about northeast of New Zealand's North Island...

, tatagia in Samoa

Samoa

Samoa , officially the Independent State of Samoa, formerly known as Western Samoa is a country encompassing the western part of the Samoan Islands in the South Pacific Ocean. It became independent from New Zealand in 1962. The two main islands of Samoa are Upolu and one of the biggest islands in...

, tātāngia in Tonga

Tonga

Tonga, officially the Kingdom of Tonga , is a state and an archipelago in the South Pacific Ocean, comprising 176 islands scattered over of ocean in the South Pacific...

 and Martaoui in New-Caledonia

Uses

The tree is used as a toxin

Toxin

A toxin is a poisonous substance produced within living cells or organisms; man-made substances created by artificial processes are thus excluded...

 in fishing. It incapacitates the fish, but it is apparently not harmful to people.

Bark

• N-methyltryptamine
  N-Methyltryptamine
  N-Methyltryptamine , or methyltryptamine, is a member of the tryptamine chemical class. It is an alkaloid, probably derived from L-tryptophan, that has been found in the bark, shoots and leaves of several plant species, including Virola, Acacia, Mimosa and Desmanthus often together with the...
  
  
• N,N-dimethyltryptamine
  Dimethyltryptamine
  N,N-Dimethyltryptamine is a naturally occurring psychedelic compound of the tryptamine family. DMT is found in several plants, and also in trace amounts in humans and other mammals, where it is originally derived from the essential amino acid tryptophan, and ultimately produced by the enzyme INMT...
  
  
• 2-methyl-1,2,3,4-tetrahydro-B-carboline

Leafy stems

• N-methyltryptamine
• N,N-dimethyltryptamine
• 2-methyl-1,2,3,4-tetrahydro-B-carboline
• N,N-formylmethyltryptamine
• Traces of another unidentified alkaloid

Stem bark

Total alkaloids 3.6% of which 40% N-methyltryptamine, 22.5% N,N-dimethyltryptamine, 12.7% 2-methyl-1,2,3,4-tetrahydro-β-carboline.

Twigs

Total alkaloids 0.11%, of which
N-methyltryptamine 26.3%, 6.2% N,N-dimethyltryptamine, 5.8% 2-methyl-1,2,3,4-tetrahyrdo-β-carboline, 1.6% N,N-formylmethyltryptamine.