Dipteryx alata is a large, undomesticated, edible nut-bearing tree from dryish tropical lowlands in central South America belonging to the legume family, Fabaceae, from the Dipterygeae tribe in the Faboideae subfamily.
It is known in Spanish as almendro (almond) in Santa Cruz department in southern Bolivia, almendrillo in Pando in northern Bolivia, and shihuahuaco in the Department of Madre de Dios in southern Peru. In both these last two regions it shares the same name with Dipteryx micrantha. Both tree species are also known as mawi in the Ese Eja language spoken there.
The common name baru appears to be the most used in Brazilian Portuguese. A long list of other names used in Brazil have been recorded; some of these names are barujo, coco-feijão, cumaruna, cumarurana, cumbaru, emburena-brava feijão-coco and imburana-brava. A number of names, such as cumaru and pau-cumaru, are shared with the closely-related Amazonian D. odorata, the tonka bean or cumaru tree, due to the similarity of the two trees. Harri Lorenzi complied most of these names in 1992, culled from the herbarium sheets he had collected, and the names can be traced to specific regions.
The German botanist Julius Rudolph Theodor Vogel named the species alata, which means "winged"  and refers to the winged petiole of the leaves. As a legume, this tree belongs to the botanical family Fabaceae; this is also known as Leguminosae, and commonly known as the bean, or pea, family. The Dipterygeae tribe is an early branching of the Faboideae subfamily of the legumes, dating ~58 million years and preceding staple legumes such as soybeans, peas or peanuts by ~10 million years. It is quite distant from other less-known legumes such as Inga, Parkia, Tylosema, or tamarinds).
The tree can measure up to 25 m in height and 0.7 m in diameter.
It has compound leaves with 6 to 14 leaflets. The greenish-white flowers are 6 to 15mm in diameter.
The form of the fruit (a bean pod) is ovoid and contains a juicy flesh within. The fruit has an average weight of 25g and average dimensions of 52.40 ± 4.48mm for length, and 38.31 ± 4.05 mm for width. Of these:
- 42% is pulp
- 53% is ligneous endocarp
- 5% is seed
Bolivia: It has been recorded in northwestern Bolivia in the province of Abel Iturralde (in northern La Paz Department) and Madre de Dios (in Pando Department), and in southeastern Bolivia in the provinces of Andrés Ibáñez, Chiquitos, Germán Busch, Ichilo, Ñuflo de Chávez, Sara and José Miguel de Velasco (all in Santa Cruz Department). It grows in the tropical savannah of the Chiquitania region. It grows in Noel Kempff Mercado National Park, and is thought to grow in Madidi National Park.
Brazil: It can be found in suitable habitat throughout much of central and western Brazil. It occurs in the north in the states of Pará and Tocantins, in the west in Acre, Amazonas and Rondônia, in the northeast in Bahia, Maranhão, Piauí and possibly Ceará, in the central-west in Distrito Federal, Goiás, Mato Grosso and Mato Grosso do Sul and in the southeast in Minas Gerais, Paraná and the Atlantic coast of São Paulo. According to Siqueira et al. (1992) it is almost extinct in the wild in these last two states, but found almost exclusively planted ex situ.
It is found in the Amazon, Caatinga and central Brazilian savannah (called Cerrado in Brazil) phytogeographical regions. It grows mostly in the vegetative associations of Cerrado , but also in tropical riverine and/or gallery forests, seasonally semi-deciduous tropical forests and Amazonian savannahs.
It grows in areas with soil of low fertility in northern Bolivia, but in Goiás it is typical for Cerrado areas with more soil fertility, where it occurs in a uniform manner. It may reliably be used as an indicator species of such conditions (Macedo, 1992), not occurring where the fertility is naturally very low.
Unlike most legumes, baru trees harbor no symbiotic nitrogen-fixing bacteria in root nodules and in fact depend on fixing nitrogen from water tables with their deep roots.
A tree will produce about 150 kg of fruit per harvest in alternating years, being pollinated by native bees. The fruits are a food source for birds and small mammals, such as rodents, bats, and monkeys.
It is used as lumber, for charcoal production and for shade in pastures, by the indigenous peoples of its range. The fruits are often used as feed for cattle. The seeds are a nutritious part of the local communities' diet.
According to Alexiades some among the Ese Eja people, which have recently started using the hallucinogenic drug ayahuasca, see visions of concrete houses under the influence of this drug, which according to a source interviewed by Alexiades represents a tree of this species. Alexiades theorises that this tree is to be considered a "teacher plant" in the new ayahuasca shamanism that the Ese Eja have adopted and that it, in specific, and trees in general, represents the "future".
Uses for the fruit can be summarized as:
|Part of the Fruit||Product/Sub-Product||Uses|
|Pulp||Pulp in natura||Human food|
|Dehydrated Pulp||Human food|
|Residues||Farming (organic fertilizer)|
|Seed||Raw Seed||Human food|
|Roasted Seed||Human Food|
|Pyroligneous acid and tar||Industrial|
A tree has a useful lifespan of 60 years.
The baru tree grows wild, but there are recent attempts at large scale cultivation. The fruit matures shortly before rain season in the cerrado, which could range between June to October depending on its latitude.
Its brown fruits are either collected from the ground or picked from the tree when they are almost ripe.
Baru fruit extraction is a profitable alternative to deforestation. Several cerrado communities rely on the sale of baru fruits and seeds as a source of revenue.
Food and nutrition
Out of the fruit, the pulp is sweet and nutritious. It can be consumed fresh, but is also used to manufacture jams, jellies, and liquors. The seeds should be served after roasting, which deactivates a trypsin inhibitor component, which would otherwise inhibit the bodies' ability to digest protein. The seeds can be eaten as a snack or used as an ingredient for baked goods, cereal bars, pesto sauce, drinks, desserts, and ice cream; the oil extracted from the seeds may be used as a culinary ingredient, comparable to olive oil, and as a cosmetic.
|Nutritional value per 100 g (3.5 oz)|
|Energy||2,238 kJ (535 kcal)|
|Dietary fiber||9.2 g|
|†Percentages are roughly approximated using US recommendations for adults.|
According to an anonymous assessor writing for the IUCN in 1998, this species is vulnerable due to over-collection of the seeds, usage as timber, and habitat loss by intensive farming. However, the IUCN fails to provide references to back up this claim, and use a restricted distribution instead of the actual range.
|Wikimedia Commons has media related to Dipteryx alata.|
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This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. (August 2017) (Learn how and when to remove this template message)
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