How can scientists estimate the age of some palms from leaf scars?

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Dense grove of acai palm trees (Euterpe oleracea) with slender trunks and abundant green fronds growing on Combu Island in Belem, Para, Brazil. — Palm Wild acai palms (*Euterpe oleracea*) growing on Combu Island in Belem, state of Para in Brazil.

Scientists can estimate the age of certain palms by counting the leaf scars left on the trunk and determining the length of time the plant requires to produce a single leaf.1

However, this method must be applied with significant caution. Research indicates that the rate of leaf production is not constant and can vary depending on environmental factors. Because of these fluctuations, counting scars provides an estimate rather than a precise chronological record.1

While many palms have life spans ranging from 50 to 100 years, some species are exceptionally long-lived; for instance, the double coconut (Lodoicea maldivica) can live up to 350 years, and Livistona eastonii has been documented to reach 720 years of age.1