Una nueva especie de Arachis (Fabaceae) de Mato Grosso, Brasil, afín a A. matiensis

In the original description of Arachis matiensis, two isolated populations, from the municipality of Caceres, Mato Grosso State, Brazil, were listed as possibly representing a different species, but the analysis of additional materials, and further morphological study were considered necessary to reach a decision in that regard. New herbarium and germplasm collections in the area, additional morphological studies, and inter- and intraspecific crossing results now support the description of A. jacobinensis, a new species of the taxonomic section Procumbentes