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conifers.org: The Gymnosperm Database: natural history, botany and taxonomic information on conifers, cycads, ginkgo and related plants.

A natural history newsletter dedicated to interesting biological topics, including unusual and little-known plants and animals.

YouTube is a place to discover, watch, upload and share videos.

ARKive - The ultimate multimedia guide to the world

Living Stones Nursery / Plants for the Southwest is a nursery specializing in the cacti and succulents of the world, with special emphasis on the Sonoran ,Chihuahuan and Mojave deserts of North America, the arid lands of both South Africa and South A...

Encyclopedia of Earth Welcome to the Encyclopedia of Earth, an electronic reference about the Earth, its natural environments, and their interaction with society. The Encyclopedia is a free, fully sea ...

AskNature is the world's first digital library of Nature's solutions, organized by function, that can serve as an educational and cross-pollinating tool as well as a collaboration forum among biologists, engineers, designers and other innovators.

Memidex is a free online dictionary and thesaurus with extensive cross-referencing, complete inflections, simple interface, and frequent updates. It