Biology for NEET/AIIMS/JISPER/BHU/NCERT etc. (Bilingual : English-Hindi)
Pteridophytes are first group of terrestrial plants which are vascular . They possess vascular tissues like xylem and phloem. Vascular tissues are organised into Steles. Steles are central vascular cylinders found in the main axis of the vascular plants. Steles consist of xylem, phloem, pith( if present ) etc. They are delimited by pericycle from the cortex.
Types of Steles in Pteridophytes
1. Protostele
2. Siphonostele
3. Dictyostele
4. Eustele
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