Abstract
My previously published provisional classification of the Cycadales is here formally published. This classification is based upon a cladistic analysis of characters ranging from gross morphology to phytochemistry. Encephalartos is lectotypified.
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An erratum to this article is available at http://dx.doi.org/10.2307/2807191.
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Stevenson, D.W. A formal classification of the extant cycads. Brittonia 44, 220–223 (1992). https://doi.org/10.2307/2806837
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DOI: https://doi.org/10.2307/2806837