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Pteridophyta
- 1. SCIENCE SEMINAR VISHNU SHESHATHRI MOUNT LITERA ZEE SCHOOL, TIRUPPUR 1
- 2. WHAT IS PTERIDOPHYTA? • A pteridophyte is a vascular plant (with xylem and phloem) that reproduces via spores. • The term is now used only informally to denominate a fern (monilophyte) or lycophyte. Because pteridophytes produce neither flowers nor seeds, they are also referred to as "cryptogams". • The pteridophytes include the ferns, horsetails, and the lycophytes. 2
- 3. PTERIDOPHYTA CHARACTERISTICS • Pteridophytes are the first true land plants. • They are seedless, vascular cryptogams. • Life cycle is heterologous diplohaplontic type. • Sporophyte has true roots, stem and leaves. • Spores develop in sporangia are homosporous or heterosporous. • Sporangia are produced in groups on sporophylls. 3
- 4. • The Thallophytes,Bryophytes and Pteridophytes have naked embroys that are called spores. • All these have hidden reproductive organ. 4
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