Name:
Cycadales.
English: Cycads.
BotanyRoot: with N2-fixing cyanobacteria.
Stem: pachycaulous.
Leaves: dioecious; pinnate megaphylls.
Reproduction: zooidogamy; males with pollen cones; pollen tube simple.
TaxonomyCycadales is an Order in
Gymnospermae.
In the
Plant theory Cycadales is placed in the Class
Cycadidae in the
Gymnospermae.
Cycadales has 2 families and 10 genera.
Cycadaceae: Cycas.
Zamiaceae: Ceratozamia, Dioon, Encephalartos, Lepidozamia, Macrozamia, Microcycas, Stangeria, Zamia.