Illustration of Ceratozamia osbornei A pollen strobilus at maturity B variation of leaflets C microsporophyll D ovulate strobilus at maturity E adult plant A–C based on B. K. Holst 4105 and D, E based on cultivated plant in Fairchild Tropical Botanic Garden.

 
 
  Part of: Martínez-Domínguez L, Nicolalde-Morejón F, Vergara-Silva F, Stevenson DW (2022) Monograph of Ceratozamia (Zamiaceae, Cycadales): an endangered genus. PhytoKeys 208: 1-102. https://doi.org/10.3897/phytokeys.208.80382