- Gymnosperms - http://www.geocities.com/Heartland/Plains/6761/ecycads.htm
General introduction to the gymnosperms, the group of vascular plants whose seeds are not enclosed by a ripened ovary (fruit).
- Gymnosperm Database - http://www.conifers.org/
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.
- Phylum Pinophyta: The Conifers - http://www.science.siu.edu/landplants/Coniferophyta/coniferophyta.html
General description with photos of selected representatives of the included families and genera.
- Conifer Central - http://members.tripod.com/~Hatch_L/concent.html
Resources, evaluation, books, nursery sources, description, and identification. Includes original keys to major coniferous genera.
- Arboretum de Villardebelle - http://www.pinetum.org/
Includes photographs and information on conifers from around the world, gymnosperm taxonomy, and scientific articles.
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