Located in the leaf pouches of  H. physophora are extrafloral nectaries, which provide the ants with nectar made by the plant, though this looks like simple parasitism by the ants, the plant also benefits greatly from this relationship.
Allomerus decemarticulatus is an Amazonian ant species found in the tropics of South America. They live in leaf pockets of a host plant species, Hirtella physophora. H. physophora Also located in the leaf pouches are extrafloral nectaries, which provide the ants with nectar made by the plant, and also some food bodies that provide the ants with further nutrition as they mature to become foragers and insect predators. So far this looks like simple parasitism by the ants, as if they simply take advantage of the plant for food and shelter. 
