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

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

Vol.1 includes a list of flowering plant families (p.299-316) and a concordance of family names accepted by Cronquist, Takhtajan, and Thorne. Vol.2+ include dis