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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..