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Cross-section through a dicot root at the beginning of secondary growth
Legend:
1 epidermis
3 phloem
4 xylem
2 cortex
English name: Sunflower
Scientific name: Helianthus annuus
Familia: Compositae
Classis: Dicotyledonas
Phylum: Angiospermae
Regnum: Plantae
Cross-section through a dicot root. The vascular cambium that builds secondary xylem (to the inside) and phloem (to the outside) has developed between the primary vascular xylem and phloem. In the outer layer of the pericycle the cork cambium develops which will form cork and cause degeneration of all (endodermis and cortex) tissues located outside the pericycle.
