1. The remains of the lignified and surrounds the single seed. 2. Xylem cells are elongated cells with lignified secondary thickening of the cell walls. 3. The epidermal cells are lignified , the surface carries a thick cells however secrete. 4. His system was based on the height of the lignified stem and on plant longevity. 5. The fibres of the xylem are always lignified , while those of the phloem are cellulosic. 6. The fruit has a single seed wrapped in a hard coat and can be slightly lignified . 7. These layers are lignified with malphigian cells tightly packed together and impregnated with water-repellent. 8. Growing to height also employed another trait of tracheids the support offered by their lignified walls. 9. All tracheary elements develop a thick lignified cell wall, and at maturity the protoplast has broken down and disappeared. 10. At maturity the protoplast the living material of the cell dies and disappears, but the lignified cell walls persist.
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