Question

Please provide the examples of four classes of pteridophytes.
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Answer 1

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Answer...

The four classes are →

psilopsida →

• psilotum

Lycopsida →

• selaginella
• lycopodium

Sphenopsida →

• equisetum

Pteropsida →

• Dryopteris
• Pteris
• Adiantum

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Answer 2

Answer:

Pteridophytes are vascular plants that are dispersed through spores.

There are four classes present in this phylum.

Explanation:

The four classes present in the phylum pteridophyta are:

Class Psilotopsida:

These are saprophytes which does not have roots.

Eg: Psilotum and Tmesipteris

Class Lycopsida:

These are saprophytes with a wee defined body structure.

Eg: Isoetes, Lycopodium

Class Sphenopsida:

These are saprophytes with nodes and internodes in stems and branches.

Class Pteropsida:

These are perenial saprophytes.

Eg: Ferns

Eg: Equisetum