Did you know?
In Brazil the fruit has two everyday names, cajá and taperebá, and the tree that bears it is the cajazeira[5, 9, 10].
Ubos juice gets better overnight: the slight astringency of the fresh fruit fades as the juice stands[3, 4].
Pigs eat the fallen fruit whole, which suits its English name, hog plum. In Brazil, tapirs, wild pigs, tortoises and even fish such as the pacu feed on the fruit and spread its seeds[4, 11].
Farmers plant ubos in close rows as living fence posts, and its light, easily worked wood has been used for boxes, matches and dugout canoes[3, 4, 9].
Ubos is a cousin of the mango, the cashew and the pistachio. All belong to the cashew family, Anacardiaceae[1, 6, 8].
Origins and history
Ubos is a deciduous tree of the humid lowland tropics, where it grows in both wild forest and farmland[3, 4, 5]. It can grow taller than 25 meters (80 feet), and its thick bark is corky and deeply grooved[3, 4, 5]. Large, branched clusters of small white flowers give way to oval fruits about 3 to 4 centimeters (1.5 inches) long. They ripen from green to yellow or light orange, with a thin skin and very juicy, tangy pulp[3, 4, 5]. Carl Linnaeus described the species in his Species Plantarum of 1753[1, 2]. Its home range runs from Mexico and the Caribbean through Central America to Brazil, Bolivia and Peru, and the tree also grows in West and Central Africa and parts of Asia[1, 3, 4].
The tree has many names: yellow mombin and hog plum in English, jobo and ciruela in Spanish, mombin in French, cajá and taperebá in Brazil, and ubos in Peru and Bolivia[4, 9, 10, 11, 12]. Cajá comes from Tupi, an Indigenous language of Brazil[11], and jobo from hobo, a word of Carib origin[13]. In the Brazilian state of Acre the tree is also called taperebá-de-anta, the "tapir's taperebá"[11]. It is eaten fresh or turned into pulp, juices, nectars, syrups, jams, jellies and ice creams[3, 4, 5]. Animals seek out the fallen fruit too, and farmers feed the leaves to cattle[4, 9]. In Brazil it grows both in the Amazon and in the Atlantic Forest, and it springs up around homes and villages as well as in the wild[5].
Traditional uses
Clinical studies of ubos in people are still few, but its traditional use is rich: across its range, nearly every part of the tree has found a use, from the bark and leaves to the flowers, roots and fruit[3, 6].
Teas of leaf, bark and flower
Traditional preparations include simple teas: the leaves, flowers or bark are steeped in hot water or simmered as a decoction, then strained[3, 4, 6].
Digestive comfort
Teas of the bark and flowers have a long folk tradition for the digestive tract. Ubos supports digestive comfort.*[3, 4]
A calm mood
In southwestern Nigeria, a tea of the leaves is a folk tradition for the nerves, and the fresh leaves are chewed to support memory.* Ubos supports a calm, balanced mood.*[14]
Women's health
In Peruvian folk tradition, ubos is one of the plants women take for comfort during the monthly cycle. Ubos supports women's health through the monthly cycle.*[14]
A fruit for the table
The ripe fruit is eaten fresh, and in Brazil its pulp is a much-loved, high-value flavor for juices and ice creams[4, 5].
Plant compounds
Ubos leaves and stems contain naturally occurring plant compounds called tannins, notably the ellagitannins geraniin and galloyl geraniin[6, 7].
Precautions
Where our ubos comes from
Our ubos bark is wild-harvested. Every batch is tested for heavy metals, mold, yeast and pathogens.
- Wild-harvested
- South America
- Tested every batch
Raintree products with ubos
Ubos is also an ingredient in these Raintree products
Frequently asked questions
What is ubos in English?
Ubos is the yellow mombin, also called hog plum. Its botanical name is Spondias mombin.
Is ubos the same as cajá?
Yes. Cajá and taperebá are the Brazilian names for the fruit of Spondias mombin, the same tree that is called ubos in Peru.
What does ubos fruit taste like?
Tart and tangy with a little sweetness. The pulp is very juicy, and the fresh fruit has a slight astringency that fades once the juice has stood for a while.
Which part of ubos does Raintree use?
The bark, which is wild-harvested. The fruit is a food and is not in our products.
Is ubos related to mango?
Yes. Ubos belongs to the cashew family, Anacardiaceae, along with the mango, the cashew and the pistachio.
Where does ubos grow?
In the humid lowland tropics from Mexico and the Caribbean to Brazil, Bolivia and Peru. It also grows in West and Central Africa and in parts of Asia.
References
- Royal Botanic Gardens, Kew. Spondias mombin L. Plants of the World Online. powo.science.kew.org. Accessed 29 Sep 2026.
- International Plant Names Index. Spondias mombin L., Species Plantarum 1: 371 (1753). ipni.org
- Useful Tropical Plants. Spondias mombin. tropical.theferns.info
- Orwa C, Mutua A, Kindt R, Jamnadass R, Anthony S. Spondias mombin. Agroforestree Database: a tree reference and selection guide, version 4.0. World Agroforestry Centre, Kenya. 2009. worldagroforestry.org
- Adaime R, Sousa MSM, Deus E, et al. Spondias mombin as a reservoir of fruit fly parasitoid populations in the Eastern Amazon: an undervalued ecosystem service. PeerJ. 2021;9:e11530. doi:10.7717/peerj.11530
- Sameh S, Al-Sayed E, Labib RM, Singab AN. Genus Spondias: a phytochemical and pharmacological review. Evidence-Based Complementary and Alternative Medicine. 2018;2018:5382904. doi:10.1155/2018/5382904
- Corthout J, Pieters LA, Claeys M, Vanden Berghe DA, Vlietinck AJ. Antiviral ellagitannins from Spondias mombin. Phytochemistry. 1991;30(4):1129–1130. doi:10.1016/S0031-9422(00)95187-2
- Encyclopaedia Britannica. Anacardiaceae. britannica.com
- GBIF.org. Spondias mombin L.: vernacular names (Flora e Funga do Brasil, GRIN Taxonomy, TAXREF) and species descriptions. gbif.org. Accessed 29 Sep 2026.
- Priberam Dicionário da Língua Portuguesa. Taperebá. dicionario.priberam.org
- Carvalho PER. Cajá-da-mata (Spondias mombin). In: Espécies Arbóreas Brasileiras, vol. 2. Brasília: Embrapa Informação Tecnológica; Colombo: Embrapa Florestas; 2006:125–132. alice.cnptia.embrapa.br
- Rengifo Salgado E. Las ramas floridas del bosque: experiencias en el manejo de plantas medicinales amazónicas. Instituto de Investigaciones de la Amazonía Peruana (IIAP); 2007. iiap.gob.pe
- Real Academia Española. Hobo; jobo. Diccionario de la lengua española, 23rd ed. dle.rae.es
- Ogunro OB, Oyeyinka BO, Gyebi GA, Batiha GE. Nutritional benefits, ethnomedicinal uses, phytochemistry, pharmacological properties and toxicity of Spondias mombin Linn: a comprehensive review. Journal of Pharmacy and Pharmacology. 2023;75(2):162–226. doi:10.1093/jpp/rgac086
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