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Acta Amazonica

Print version ISSN 0044-5967On-line version ISSN 1809-4392

Abstract

MELO, Efigenia de; FERREIRA, Carlos Alberto CID  and  GRIBEL, Rogério. A new species of Coccoloba P. Browne (Polygonaceae) from the Brazilian Amazon with exceptionally large leaves. Acta Amaz. [online]. 2019, vol.49, n.4, pp.324-329.  Epub Nov 04, 2019. ISSN 0044-5967.  https://doi.org/10.1590/1809-4392201804771.

We describe and illustrate a new species of Coccoloba (Polygonaceae), named Coccoloba gigantifolia, from the Brazilian Amazon. It resembles Coccoloba mollis Casar, but differs from the latter species by its much larger leaves in the fertile branches. The species has only been recorded in the Madeira River basin, in the states of Amazonas and Rondônia, in the central and southwestern Brazilian Amazon. The description was based on herbarium material, cultivated plants, and individual trees in their natural habitat. We provide illustrations, photographs, and an identification key with morphological characteristics that distinguish the new taxon from the other two related taxa of the Coccoloba sect. Paniculatae, as well as comments on the geographic distribution and conservation status of the species.

Keywords : taxonomic botany; Amazon rainforest; geographic plant distribution; Paniculatae.

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