Phytelephas aequatorialis
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Description
The plants are dioecious, with the female individuals bearing large brown conical fruits, each approximately the size of a grapefruit (but occasionally up to fourteen inches (35 centimeters) in diameter and weighing up to 42 pounds (19 kilograms) and covered in a horned husk, containing usually four seeds. Immature seeds contain sweet edible pulp. Mature seeds are harder than wood and are encased in a bonelike shell. The endosperm is a white hemicellulose material that is so hard it can be polished and carved like ivory. The male flowers are in a catkin, and each flower has as many as 1,000 stamens, the greatest number in any monocot. The plant's genus name Phytelephas means "elephant plant". Three other species in this genus are sources of vegetable ivory as well.
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Animal consumption
The edible immature seeds are often dispersed by rainforest rodents such as agoutis. In some rural areas the trees are used to attract rodents, which are then captured for their meat.
Animals that feed on the fleshy mesocarp of the palm's fruit include squirrels (Sciurus aestuans), agoutis (Dasyprocta spp.), deer (Odocoileus virginianus), opossums (Marmosa spp.), porcupines (Coendou spp.), and Cuniculus paca.
Cultivation
The palms are occasionally cultivated as a cash crop. International conservation organizations pay farmers for vegetable ivory in hopes that interest in the product will lead to resources being allotted for the protection of rainforests and the preservation of its flora.
Due to its commercial usefulness, the trees were usually preserved when rainforest was cleared for agricultural use.