Selaginella (used 6 times in NCERT)

• The leaves in pteridophyta are small (microphylls) as in Selaginella or large (macrophylls) as in ferns

• You may recall that in bryophytes the dominant phase in the life cycle is the gametophytic plant body. However, in pteridophytes, the main plant body is a sporophyte which is differentiated into true root, stem and leaves

•  In some cases sporophylls may form distinct compact structures called strobili or cones (Selaginella, Equisetum)

Selaginella Plant-

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• Genera like Selaginella and Salvinia which produce two kinds of spores, macro (large) and micro (small) spores, are known as heterosporous.
• The pteridophytes are further classified into four classes: Psilopsida (Psilotum); Lycopsida (Selaginella, Lycopodium), Sphenopsida (Equisetum) and Pteropsida (Dryopteris, Pteris, Adiantum).