''Guamia'' is a monotypic genus of

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek words ('container, vessel') and ('seed'), and refers to those plants th ...

s in the soursop family, Annonaceae. The sole species it contains, ''Guamia mariannae'', is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to the Marianas Islands.

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Monotypic magnoliid genera Annonaceae genera Flora of the Mariana Islands Taxa named by William Edwin Safford {{Annonaceae-stub