Annona is the type genus of the plant family Annonaceae. This large genus comprises about 100-150 species of mostly Neotropical trees and shrubs with alternate, simple, leathery leaves and most of which have edible fruit. In the family Annonaceae, only Guatteria has more species. A few species are found in Africa, but none in Asia. The name derives from the Taínoannon.
The following is a list of some of the more important species. Many of them have significant agricultural, medicinal, pharmaceutical, and other uses.
Type Collections of Neotropical Annonaceae _ Annona — has pictures and details on these and other Annona species (http://www.botanik.univie.ac.at/annonaceae/indices/neotropics/typetaxa/annona.htm)
The genus Annona comprises more than 50 species of trees and shrubs; with few exceptions, they are native to tropical America.
The annonas exhibit great variation in climatic and soil requirements as well as in quality of fruit, which suggests that improved types could be developed readily by controlled crosses and by selection.
The Ilama (Annona diversifolia Saff.) produces fruit similar to that of the cherimoya.