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.
Conifers Images - - Microscopic images of various parts and sections of conifers.
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).