Brazil-nut Tree…‘Castanheiro do Para’ Its amazing reproduction system.

Brazil-nut Tree…‘Castanheiro do Para’ (Brazil)

Brazil-nut trees are huge. They can reach over 200 feet/30 metres high. They dominate the forest and are protected by law from cutting down. They grow in pristine forest, necessary for their complicated reproduction system.

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At the very beginning of the reproduction system the Brazil nut tree needs an orchid and a bee.
The orchid bee (Euglossa) collects nectar from the flowering Brazil nut trees. These specialist bees have a long tongue that can open the flower.
As they collect nectar the bees spread pollen from tree to tree fertilising the yellow Brazil nut tree flowers and thereby the fruit…the nuts.
The male orchid bees attract females with the fragrance from a particular orchid. The larger female orchid bee pollinates the Brazil-nut Tree.

The nuts, that we know are the seeds of the tree, which are enclosed in a large husk similar to that of a coconut. The shell is rock solid and needs to be opened with a sharp machete to release the 8 to 24 seeds, so how does it get opened in the wild?
The answer is the Agouti. A large rodent with razor sharp, chisel-like teeth. The agouti eats some of the seeds and takes off others to bury them for later. If some of the seeds are forgotten they will eventually germinate and grow into new trees.

Brazil-nut husks ready for opening. The empty shells I used as plant pots and holders.

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The Brazil-nut Tree needs a bee, an orchid and an agouti to reproduce. It needs pristine, untouched forest for these conditions to be met. Deforestation, even if the tree is kept in place, can affect anyone of these conditions so that reproduction cannot take place and we lose a magnificent tree as well as a delicious food source.

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3 thoughts on “Brazil-nut Tree…‘Castanheiro do Para’ Its amazing reproduction system.

  1. Wow – they are huge! I knew the nuts themselves were huge, but still!

    You’re right, though, it would be a big shame to lose those delicious nuts – and everything else we would lose at the same time.

    • I too was surprised to find Brazil nuts came out of huge shells. Always seen them in supermarkets, prepared, previously and hadn’t given it further thought.
      Many of the trees and plants reproduction systems held in a similar precarious balance….we must do what we can to protect them.
      See #LovetheAmazon new initiative to protect an area

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