Arboretum de Villardebelle: Includes photographs and information on conifers from around the world, gymnosperm taxonomy, and scientific articles.Conifer Central: Resources, evaluation, books, nursery sources, description, and identification. Includes original keys to major coniferous genera.Gymnosperm Database: Basic information (sometimes only a name) for all species and higher-ranked taxa of the gymnosperms, including conifers, cycads, and their allies. Includes many images.Gymnosperms: General introduction to the gymnosperms, the group of vascular plants whose seeds are not enclosed by a ripened ovary (fruit).Native Conifers of North America: Key, descriptions of all genera and species, images, and range maps.Phylum Pinophyta: The Conifers: General description with photos of selected representatives of the included families and genera.