All Ceratozamia species grow well in south Florida and make excellent landscape plants because of colorful new growth and graceful, arching leaves.  Relatively inexpensive selections for landscaping include C. hildae, C. latifolia, C. robusta, and C. kuesteriana.  Every garden should have one or a collection of these.  Of all the cycads the taxonomy seems to be changing fasted among this genus.  Recently tenuis and mexicana have been clarified and now the plant we’ve had in cultivation for many years known as robusta ‘Santiago Tuxtla’ is officially elevated to species level.  The species count continues to grow.

Many difficulties exist in classifying Ceratozamia both because of natural and man-made problems.  Naturally occurring difficulties such as populations dynamics with overlapping or intermediate characteristics, inaccessible locations for study on mountain tops, in caves, and cliff sides, and primarily habitat loss and fragmentation.  Man-made taxonomic difficulties further complicate our understanding and ability to discuss the plants.  Futher, many plants were extirpated from Mexico in the 1970‘s and 80‘s with little to no collection data.  Some species are popular in cultivation and rare in nature like Ceratozamia hildae and norstogii.  Several species have recently been described and are virtually non-existent in botanical gardens or private collections.  With luck the taxonomic problems will be settled using modern DNA analysis.  In the meantime we can enjoy the available species as beautiful garden plants

 
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Ceratozamia species

currently there are 30  taxa recognized as valid species names according to the World List of Cycads