Genus Dioon
Dioon is a genus of cycads in the family Zamiaceae.Species in the genus Dioon of plants
Palma de la Virgen - Dioon edule is a cycad native to Mexico, also known as palma de la Virgen.
Dioon purpusii - The epithet purpusii, chosen by Joseph Nelson Rose, is an homage to one of Rose's contemporaries, colleague Carl Albert Purpus .
Dioon spinulosum - Dioon spinulosum prefers well-drained soil with regular water. It will grow in soils containing few nutrients, in soils rich in limestone, and on slopes. It is hardy to USDA Zones 9B – 11.