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=  Archidendron jiringa = Archidendron jiringa, commonly known as Djenkol, Jenkol or Jering is a species of flowering tree in the pea family, Fabaceae. It is native to Southeast Asia, where the seeds are a popular dish. They are mainly consumed in Thailand, Malaysia, Burma, and Indonesia and prepared by frying, boiling, or roasting and are also eaten raw. The beans are mildly toxic due to the presence of djenkolic acid, an amino acid, which causes djenkolism (jengkol bean poisoning). The Beans and Leaves of the Djenkol Tree are traditionally used for medicinal purposes such as purifying the blood. The seeds have an antioxidant effect and they are also being tested for antidiabetic properties.

Morphology
Archidendron jiringa is a legume tree with a size of 18 – 25m, has spreading crown and bipinnate leaves (up to 25 cm) and greyish smooth bark (Lim 2012, Donald 2009, Sridaran et al. 2012, Wiriadinata 1993). The young leaves have a wine-red colour and are edible. Flowering time of the tree is between September and January (Suharjono 1968).The white calyx cup-shaped flowers are bisexual and have various yellowish-white stamens. The fruit (legume) of the tree is a woody, glabrous and deep purple Pod. Each Pod contains around 3-9 round shaped seeds in the inside (Donald 2009) and are formed falcate or twisted in a wide spiral. Testa (seed coat) of a young seed shows a yellow-green colour and turns into dark brown during ripening. The seeds of a ripe fruit dehiscent along the ventral suture (Wiriadinata 1993).

Habitat and Ecology
The tree is indigenous to primary and secondary forests of humid in mountainous and undulating areas and on river banks from a sea-level up to 1’600m altitude in Southeast Asia (Bangladesh, Indonesia (Sumatra, Sulawesi, Kalimantan), Malaysia, Myanmar and South Thailand) (Lim 2012, and Source 1 from wiki: sosarsenic.net). Djenkol growth ideal in pervious sandy or lateritic soil and needs a high rainfall guaranty (Lim 2012, Wiriadinata 1993).

Medicinal Purposes
Different parts of the djenkol tree are applied in traditional medicine of South-East Asia. The seeds  are eaten raw at mealtimes to purify the blood (Ong, 1998, Sridaran et al. 2012) or to cure dysentery  (Roosita et al. 2008). In traditional medicine pounded leaves and parks of Archidendron jiringa are used as a treatment option for chest pain and are applied for oral hygiene like to mitigate gum pain ore toothache. Compresses with young leaves can be used for skin problems, whereas burnet old leaves relieve itchy feelings. The powder of burnt young leaves are applied to cuts and wounds. (Muslim, Nahdzatul, and Amin Malik Shah Abdul Majid. "Pithecellobium Jiringa: A Traditional Medicinal Herb." (2010) and Lim 2010)

Other Uses
Archidendron jiringa can also be used for dyeing purposes. The pods of the seeds dye silk purple and the bark of jiringa colours material black. The shell has also be used for hair washing and timber'' as firewood, for building or coffins (Lim 2012). ''

Due to the contents of djenkolic acids in the seeds, the raw A. jiringa is also applied to the production of organic pesticides in combination with other plants to kill and prevent the growth of pests which is useful for cultivation areas (Muslim, Nahdzatul, and Amin Malik Shah Abdul Majid. "Pithecellobium Jiringa: A Traditional Medicinal Herb." (2010))

English names
Common not scientific English names for Archidendron jiringa are the following: Blackbead, Dog Fruit, Djenkol Tree, Luk Nieng Tree and Ngapi Nut (Lim 2012).

Vernacular names
Archidendron jiringa grows in different countries in Soust-East Asia and is so called quite different in each countrie. The common name in Indonesia is ''Djenkol tree, Jinkol, Jarung (Sumatra) or Jering (Java), krakos is it called in Cambodia, jering'' in Malaysia and in Thailand

''Luk Nieng, Cha Niang, Khang Daeng, Pha Niang or Cha Niang'' and in Burma tang-yin or tanyeng-pen. (Donald 2009, Lim 2012, Wiriadinata 1963)