- Phylum Lycophyta - http://www.science.siu.edu/landplants/Lycophyta/lycophyta.html
Includes phylum description, and links to images of members of the Lycopodiaceae, Isoetaceae and Selaginellaceae.
- Introduction to the Lycophyta - http://www.ucmp.berkeley.edu/plants/lycophyta/lycophyta.html
An introduction to club mosses and scale trees, their life history, morphology, ecology, systematics and fossil history.
- Phylum Lycophyta - http://botit.botany.wisc.edu/courses/systematics/Phyla/Lycophyta/Lycophyta.html
Descriptions and images of Isoetes, Lycopodium, and Selaginella from the three extant families.
- Lycopodiophyta - http://en.wikipedia.org/wiki/Lycopodiophyta
Find out about this ancient plant division and its classes. From Wikipedia.
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