Dioon edule, the chestnut dioon, is a cycad native to Mexico, also known as palma de la virgen. Cycads are among the oldest seed plants and even pre-date the dinosaurs. It belongs to the Zamiaceae plant family within the order Cycadales. The genus name "Dioon" means "two-egged", referring to the two ovules (see photo below).

Two subspecies are known, the nominate subspecies growing in a moister environment than the other:

• Dioon edule subsp. angustifolium
• Dioon edule subsp. edule

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