Material for a university practical class. Phylum Psilophyta - Includes phylum description, and links to images of members of the Psilotaceae. Phylum Pterophyta - Includes a description of the fern life cycle, list of families and genera, and links to images of selected representatives. Rhizoctonia Blight of Boston Fern - Plant pathology circular on symptoms and control of fungal blight of Nephrolepis exaltata 'bostoniensis'. The Isoetes Page - A compendium in English and Italian.
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