Celtis guatemalensis Eisermann, Zamengo & Chamorro (Cannabaceae), a new tree species from Guatemala, described in 2026

Tree of Celtis guatemalensis
Mature tree of Celtis guatemalensis Eisermann, Zamengo & Chamorro

Knut Eisermann discovered a tree species new to science, described in an article in Kew Bulletin:

Eisermann K., Zamengo, H. B., Chamorro, D. C., Avendaño-Mendoza, C., Faleiro de Lima, R., Barrios, A., Aju, L. J. & Cabañas, S. (2026) Celtis guatemalensis (Cannabaceae: Celtis subg. Celtis), a new tree species from the highlands of Guatemala, with an updated key for Celtis of Mexico and Central America. Kew Bulletin 81: DOI 10.1007/s12225-026-10408-x (online first).

Abstract: A new tree species, Celtis guatemalensis Eisermann, Zamengo & Chamorro (Cannabaceae: Celtis subg. Celtis) is described and illustrated based on morphological characters. The species is similar to Celtis caudata Planch. but differs in several characters on stipules, leaves, flowers, and fruits. Celtis guatemalensis occurs in semi-deciduous forest of the volcanic Pacific slope highlands of Guatemala. Phenology data was derived from six years of field observations. An updated identification key to the species of Celtis in Mexico and Central America is provided. Full-text view-only version.

See record of Celtis guatemalensis in the
International Plant Name Index

Celtis guatemalensis: branch with flowers
Celtis guatemalensis Eisermann, Zamengo & Chamorro: branch with flowers.
Celtis guatemalensis: branch with flowers, immature leaves, and stipules.
Celtis guatemalensis Eisermann, Zamengo & Chamorro: branch with flowers, immature leaves, and stipules.
Celtis guatemalensis: branch with flowers, immature leaves, and stipules.
Celtis guatemalensis Eisermann, Zamengo & Chamorro: branch with mature and immature fruits.
Celtis guatemalensis: pyrenes.
Celtis guatemalensis Eisermann, Zamengo & Chamorro: pyrenes.

The description of this new tree species is the result of a study lead by a researcher from Bird-Studies-Guatemala, in collaboration with researchers from Instituto de Pesquisa Jardim Botânico do Rio de Janeiro (Brazil), Universidad Nacional de Rosario (Argentina), Universidad Nacional Autónoma de México, and the Herbarium UVAL at Centro de Estudios Ambientales y Biodiversidad (CEAB) of Universidad del Valle de Guatemala.

bark of Celtis guatemalensis
Celtis guatemalensis Eisermann, Zamengo & Chamorro: trunk of a mature tree.
Celtis guatemalensis: pistillate flower
Celtis guatemalensis Eisermann, Zamengo & Chamorro: pistillate flower.
Celtis guatemalensis: staminate flowers
Celtis guatemalensis Eisermann, Zamengo & Chamorro: staminate flowers.
Celtis guatemalensis: seedling
Celtis guatemalensis Eisermann, Zamengo & Chamorro: seedling.
Publishing results in peer-reviewed journals.
Eisermann K., Zamengo, H. B., Chamorro, D. C., Avendaño-Mendoza, C., Faleiro de Lima, R., Barrios, A., Aju, L. J. & Cabañas, S. (2026) Celtis guatemalensis (Cannabaceae: Celtis subg. Celtis), a new tree species from the highlands of Guatemala, with an updated key for Celtis of Mexico and Central America. Kew Bulletin 81: DOI 10.1007/s12225-026-10408-x
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