It Does Not Resemble The Mammee-Tree, The Star-Apple, And Several Other Trees Of The Tropics, The Branches Of Which (As In The Laurel-Trees Of The Temperate Zone) Rise Almost Straight Towards The Sky.

The branches of the bertholletia are open, very long, almost entirely bare towards the base, and loaded at their summits with tufts of very close foliage.

This disposition of the semicoriaceous leaves, which are a little silvery on their under part, and more than two feet long, makes the branches bend down toward the ground, like the fronds of the palm-tree. We did not see this majestic tree in blossom: it is not loaded with flowers* till in its fifteenth year, and they appear about the end of March and the beginning of April. (* According to accounts somewhat vague, they are yellow, very large, and have some similitude to those of the Bombax ceiba. M. Bonpland says, however, in his botanical journal written on the banks of the Rio Negro, flos violaceus. It was thus the Indians of the river had described to him the colour of the corolla.) The fruits ripen towards the end of May, and some trees retain them till the end of August. These fruits, which are as large as the head of a child, often twelve or thirteen inches in diameter, make a very loud noise in falling from the tops of the trees. Nothing is more fitted to fill the mind with admiration of the force of organic action in the equinoctial zone than the aspect of those great igneous pericarps, for instance, the cocoa-tree (lodoicea) of the Maldives among the monocotyledons, and the bertholletia and the lecythis among the dicotyledons. In our climates only the cucurbitaceae produce in the space of a few months fruits of an extraordinary size; but these fruits are pulpy and succulent. Within the tropics, the bertholletia forms in less than fifty or sixty days a pericarp, the ligneous part of which is half an inch thick, and which it is difficult to saw with the sharpest instruments. A great naturalist has observed, that the wood of fruits attains in general a hardness which is scarcely to be found in the wood of the trunks of trees. The pericarp of the bertholletia has traces of four cells, and I have sometimes found even five. The seeds have two very distinct coverings, and this circumstance renders the structure of the fruit more complicated than in the lecythis, the pekea or caryocar, and the saouvari. The first tegument is osseous or ligneous, triangular, tuberculated on its exterior surface, and of the colour of cinnamon. Four or five, and sometimes eight of these triangular nuts, are attached to a central partition. As they are loosened in time, they move freely in the large spherical pericarp. The capuchin monkeys (Simia chiropotes) are singularly fond of the Brazil nuts; and the noise made by the seeds, when the fruit is shaken as it falls from the tree, excites the appetites of these animals in the highest degree.

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