Diamena is a genus of plants in the Agavoideae. It contains only one known species, Diamena stenantha, endemic to the La Libertad region of Peru.Kew World Checklist of Selected Plant FamiliesBraco, L. & Zarucchi, J.L. (1993). Catalogue of the Flowering Plants and Gymnosperms of Peru: 1-1286. Missouri Botanical Garden, St. Louis.
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