Orbignyaracemosa is the name of a species, part of the genus Orbignya.
This name is an alternative combination by Drude of an original description of species by Spruce under the rules of the International Code of Nomenclature for algae, fungi, and plants (ICN / commonly called the botany code)..
Botany
Revisions
Attalearacemosa SpruceAttalearacemosa is the combination used by Spruce in the original description of the species.