• 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).
• Native Conifers of North America - Key, descriptions of all genera and species, images, and range maps.
• Plant Diversity: The Conifers - Information and photographs of several gymnosperms that grow in the wet tropics of Australia.

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