#dioon  any cycad of the genus Dioon; handsome palmlike cycads with robust crowns of leaves and rugged trunks
  supertype:  cycad  any tropical gymnosperm of the order Cycadales; having unbranched stems with a crown of fernlike leaves
  member of:  genus_Dioon  small genus of arborescent cycads of Mexico and Central America; sometimes classified in family Cycadaceae
     member of:  family_Zamiaceae__Zamiaceae__zamia_family__zamiafamily  a family of cycads often included in the family Cycadaceae: zamias
        member of:  order_Cycadales__Cycadales  primitive tropical gymnosperms abundant in the Mesozoic, now reduced to a few scattered tropical forms
           member of:  class_Cycadopsida__Cycadopsida__Cycadophytina__subdivision_Cycadophytina__Cycadophyta__subdivision_Cycadophyta  palmlike gymnosperms: includes the surviving order Cycadales and several extinct orders; possibly not a natural group; in some systems considered a class (Cycadopsida) and in others a subdivision (Cycadophytina or Cycadophyta)
              member of:  class_Gymnospermae__Gymnospermae__Gymnospermophyta__division_Gymnospermophyta  plants having naked seeds not enclosed in an ovary; in some systems considered a class (Gymnospermae) and in others a division (Gymnospermophyta); comprises three subdivisions (or classes): Cycadophytina (class Cycadopsida) and Gnetophytina (class Gnetopsida) and Coniferophytina (class Coniferopsida); in some classifications the Coniferophytina are divided into three groups: Pinophytina (class Pinopsida) and Ginkgophytina (class Ginkgopsida) and Taxophytina (class Taxopsida)
                 member of:  division_Spermatophyta__Spermatophyta  seed plants; comprises the Angiospermae (or Magnoliophyta) and Gymnospermae (or Gymnospermophyta); in some classification systems Spermatophyta is coordinate with Pteridophyta (spore producing plants having vascular tissue and roots) and Bryophyta (spore producing plants lacking vascular tissue and roots)
                    member of:  kingdom_Plantae__Plantae__plant_kingdom__plantkingdom  taxonomic kingdom comprising all living or extinct plants

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