Prosopis affinis (Synonym: Prosopis algarrobilla) is a South American tree species that inhabits the Gran Chaco ecoregion. It is known as algarrobilla in Spanish.

Source: Libro del Árbol, Tome II, edited by Celulosa Argentina S. A., Buenos Aires, Argentina, October 1975. The visual material is not explicitly copyrighted or attributed, but the editors thank Mr. Jorge Vallmitjana for his "photographic contribution".

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