- 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.
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