Getty Images The fromager tree (Ceiba pentandra) Getty Images

The fromager tree (Ceiba pentandra) is used by local healers in Gabon to treat human ailments

Gabon has vast unexplored forests, which are home to forest elephants, chimpanzees and gorillas, as well as many plants unknown to science.

Poaching and disease have led to a huge number of western lowland gorillas disappearing in the wild.

They are classed as critically endangered on the International Union for Conservation of Nature’s Red List.

The research is published in the journal PLOS ONE.