| Zamia tree based on transcriptomes |
| Zamia |
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| I |
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| II |
Fischeri clade 3 sp. |
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| III |
| III‑A |
Mega Mexico A 14 sp. |
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| III‑B |
Mega Mexico B 7 sp. |
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| IV |
Zamia soconuscensis |
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| V |
Isthmus 15 sp. |
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| VI |
West of the Andes 12 sp. |
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| VII |
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Northern Colombia
(Manicata clade) 4 sp. |
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East of the Andes 13 sp. |
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Zamia is a genus of cycads (non-flowering plants with seeds) found in the Neotropical Realm of the Americas. As of May 2025, there are about 90 species of Zamia recognized by major databases of plant species. A 2024 study analyzing transcriptomes from 77 species of Zamia found support for a phylogenetic tree of seven clades for the genus occupying different geographical ranges. Clade I includes species in the Caribbean islands and Florida. Clade II includes species in states along the Gulf Coast of central Mexico. Clade III, which is divided into the sub-clades III-A and III-B, includes species found in Mexico and northern Central America. Clade IV consists of a single species found in the Mexican state of Chiapas. Clade V includes species found in southern Central America. Clade VI includes species found in southernmost Panama and west of the Andes in South America. Clade VII consists species found in northern Colombia and east of the Andes in South America.