FNA meaning in Academic & Science ?

The Flora of North America North of Mexico (usually referred to as FNA) is a multivolume work describing the native plants and naturalized plants of North America, including the United States, Canada, St. Pierre and Miquelon, and Greenland. It includes bryophytes and vascular plants. All taxa are described and included in dichotomous keys, distributions of all species and infraspecific taxa are mapped, and about 20% of species are illustrated with line drawings prepared specifically for FNA. It is expected to fill 30 volumes when completed and will be the first work to treat all of the known flora north of Mexico.

Twenty-one of the volumes have been published. Soon after publication, the contents are made available online.

FNA is a collaboration of about 1,000 authors, artists, reviewers, and editors from throughout the world