This book contains a key for the identification of the gymnosperms of the United States and Canada relying as much as possible on stem, leaf and cone characters

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

This book offers a global synthesis of gymnosperm families, fossil and extant, providing a new and distinctive perspective on the macroevolutionary biodiversity

The most comprehensive and user-friendly field guide to the trees of eastern North America Covering 825 species, more than any comparable field guide, Trees of

-- Botanical Journal of the Linnean Society