A new species of cycad, Ceratozamia alvarezii (Zamiaceae) from Chiapas, is described and illustrated. This species has affinities with C. matudai from Chiapas and C. sabatoi from Queretaro and Hidalgo. It differs from these species with regard to trunk, leaf habit, and male and female cones. It differs from C. norstogii, also from Chiapas, in that the latter is a much larger unbranched plant with a spirally twisting leaf rachis.
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USDA APHIS PPQ South Florida, POB 660520, Miami, FL 33266 USAUSDA APHIS PPQ South Florida, POB 660520, Miami, FL 33266 USA
Tang, William
Skelley, Paul
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Florida Dept Agr DPI, Florida State Collect Arthropods, POB 147100, Gainesville, FL 32614 USAUSDA APHIS PPQ South Florida, POB 660520, Miami, FL 33266 USA
Skelley, Paul
Angel Perez-Farrera, Miguel
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Univ Ciencias & Artes Chiapas, Inst Ciencias Biol, Lab Ecol Evolut, Herbario Eizi Matuda, Libramiento Norte Poniente 1150, Tuxtla Gutierrez 29039, Chiapas, MexicoUSDA APHIS PPQ South Florida, POB 660520, Miami, FL 33266 USA