1. Ceratozamia is dicotyledonous, the second cotyledon being aborted by gravity. 2. The cotyledon is often lobed at the tip. It is multifascicular, and all the bundles are derived from three. The wood ...

3. The microsporangia cover the abaxial face of the sporophylls in Ceratozamia mexicana, and are grouped upon each flank in Zamia. In Dioon, Encephalartos villosus, E. Caffer, and Macrozamia Miquelii ...