Phylum Cycadophyta

• Terrestrial Life adaptations are found
• Vascular tissues are present
• Sporophytes are dominant and photosynthetic  Gametophytes depend on Sporophytes
• Heterosporous
• For fertilization external water is not essential
• Internal water is necessary for fertilization
• Seed bearing plants
• Naked seed plants
• Do   not   bear  flowers
• Sperm possess numerous cilia
• Cones are produced by male cycadophyta
• e.g; Cycas

Cycas

• Only one type of cycadophyta which is endermic to Srilanka
• Stem – elongated, cylindrical, straight, rod like.
• Tap root system exist
• Coralloid roots are produced by the lateral roots
• Unisexual
• Dioecious
• Only few are branched
• Greenish leaves on the top of the stem
• Male plant possess cones which consist microspores in the interior
• Female plant possess crown like mega sporophyll