Lecythis ollaria

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Lecythis ollaria
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Lecythidaceae
Genus: Lecythis
Species:
L. ollaria
Binomial name
Lecythis ollaria

Lecythis ollaria is a species of tree found growing in forests in Brazil, Guyana, and Venezuela. The tree is known locally as coco de mono, and accumulates selenium in its tissues.

Contents

Description

The paradise nut is a large tree with spreading branches. It is in the same family as the Brazil nut tree (Bertholletia excelsa) and has a similar fruit. This is a large woody capsule with a lid which bursts open when the seeds are ripe. Monkeys are said to put their hands inside the capsule in order to extract the seeds which have a fleshy interior rich in oil and a woody outer casing. [2]

Toxicity

The nuts have a pleasant flavour and are eaten by humans. [2] When two previously healthy women in South America developed unexplained nausea, vomiting and neurological symptoms, followed two weeks later by heavy hair loss, no cause could at first be found. It was later established that they were suffering from acute selenium toxicity brought on by eating paradise nuts. They still had elevated levels of selenium in their blood eight weeks after they had eaten the nuts. [3] Further investigation of the tree found that the tissues of the bark, leaves, capsules and seeds all contained selenium but that the highest concentration was in the nuts which contained about five grams per kilogram, about half of which was soluble in water. [4] The tree is considered to be a selenium accumulator and part of the element is bound to very selenium-rich proteins. [5]

Status

The IUCN Red List of Threatened Species lists the paradise nut as being of least concern. This is because it has a widespread geographical distribution in the tropical rainforest. [1]

Related Research Articles

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<i>Lecythis pisonis</i> Species of tree

Lecythis pisonis, the cream nut or monkey pot, is a tropical tree in the Brazil nut family Lecythidaceae. It is known in its native tropical America as sapucaia or castanha-de-sapucaia. The fruit is shaped like a cooking pot and contains edible seeds.

<i>Lecythis</i> Genus of flowering plants

Lecythis is a genus of woody plant in the Lecythidaceae family first described as a genus in 1758. It is native to Central America and South America.

<i>Swietenia macrophylla</i> Species of plant

Swietenia macrophylla, commonly known as mahogany, Honduran mahogany, Honduras mahogany, or big-leaf mahogany is a species of plant in the Meliaceae family. It is one of three species that yields genuine mahogany timber (Swietenia), the others being Swietenia mahagoni and Swietenia humilis. It is native to South America, Mexico and Central America, but naturalized in the Philippines, Singapore, Malaysia and Hawaii, and cultivated in plantations and wind-breaks elsewhere.

<i>Dipteryx alata</i> Species of legume

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 a wild species, widespread across the Cerrado savanna in South America.

<i>Lecythis zabucajo</i> Species of flowering plant

Lecythis zabucajo, the sapucaia or paradise nut, is a large nut-producing tree occurring in the Guianas, Suriname, Venezuela, Ecuador, Honduras and Brazil, and which distribution range is much the same as that of the greater spear-nosed bat. Although not singling out Lecythis zabucajo, Jacques Huber noted in 1909 that fruit bats played the most important role in seed dispersal in Amazonian forests. The quality of its nuts led to the species' being introduced to numerous tropical countries, notably Trinidad, where it has flourished. The nuts are a valuable food resource and yield oil suitable for cooking and domestic use.

Monkey pot is a common name for many tropical trees in the genus Lecythis of the family Lecythidaceae and the fruits produced by these trees, particularly Lecythis ollaria of Brazil and Lecythis zabucajo of northeastern South America. The nuts of most Lecythis species are edible. The name is said to derive from an old proverb, "a wise old monkey doesn't stick its hand into a pot", referring to the pot-like fruit that hold the seeds, and monkeys' eagerness to obtain the seeds. Supposedly young monkey's would stick their paw into an almost ripe fruit and would be unable to get it back out for their paws were filled with nuts, while old monkey's would learn it was better to be patient and pull out the nuts one by one. The fruit is coconut-sized, and roundish and woody, with a cap that pops off when it reaches maturity. Inside the fruit are anywhere from eight to 40 seeds, which eventually fall from the woody capsule after a period of time.

<i>Lecythis ampla</i> Species of tree

Lecythis ampla is a species of woody plant in the family Lecythidaceae, which also includes the Brazil nut. Common names include coco, olla de mono, jicaro and salero. It is found in Central and South America. It has been considered an endangered species in Costa Rica.

<i>Croton megalocarpus</i> Species of flowering plant

Croton megalocarpus is a tree species in the family Euphorbiaceae. It is indigenous to ten countries in Sub-Saharan Africa, including Somalia, Kenya, Uganda, Democratic Republic of the Congo, Rwanda, Burundi, Tanzania, Malawi, Zambia, and Mozambique.

<i>Lecythis minor</i> Species of plant

Lecythis minor, the monkey-pot tree, is a small tree with toxic seeds that occurs in South America.

<i>Caryodendron orinocense</i> Species of tree

Caryodendron orinocense, commonly known as cacay, inchi or orinoconut, is an evergreen tree belonging to the family Euphorbiaceae.

References

  1. 1 2 Pires O'Brien, J. (1998). "Lecythis ollaria". IUCN Red List of Threatened Species . 1998: e.T35587A9937117. doi: 10.2305/IUCN.UK.1998.RLTS.T35587A9937117.en . Retrieved 12 November 2021.
  2. 1 2 Armstrong, W. P. "Brazil, Paradise & Cashew Nuts". Wayne's Word. Retrieved 2012-08-27.
  3. Müller, D; Desel, H. (2010). "Acute selenium poisoning by paradise nuts (Lecythis ollaria)". Human & Experimental Toxicology. 29 (5): 231–234. doi:10.1177/0960327109360046. PMID   20106940. S2CID   1044208.
  4. Ferri, T.; Coccioli, F.; De Luca, C.; Callegari, C. V.; Morabito, R. (2004). "Distribution and speciation of selenium in Lecythis ollaria plant". Microchemical Journal. 78 (2): 195–203. doi:10.1016/j.microc.2004.06.001.
  5. Hammel, C.; Kyriakopoulos, A.; Behne, D.; Gawlik, D.; Brätter, V. (1996). "Protein-bound selenium in the seeds of coco de mono (Lecythis ollaria)". Journal of Trace Elements in Medicine and Biology . 10 (2): 96–102. doi:10.1016/S0946-672X(96)80017-4. PMID   8829132.