This second volume of the magnificent compendium exhaustively describes and classifys the ferns, fern allies, and gymnosperms of North America. Covering over tw

To be published in 14 volumes over the next 12 years, this long-awaited synoptic compendium represents the first and only comprehensive taxonomic guide to the e

FNA presents for the first time, in one published reference source, information on the names, taxonomic relationships, continent-wide distributions, and morphol

FNA presents for the first time, in one published reference source, information on the names, taxonomic relationships, continent-wide distributions, and morphol