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Transverse section of a part of the vascular bundle in a dicot stem

Legend:

1  fascicular cambium
3  sclerenchyma
4  xylem
2  phloem

English name: Sunflower
Scientific name: Helianthus annuus
Familia: Compositae
Classis: Dicotyledonas
Phylum: Angiospermae
Regnum: Plantae

At the end of the primary growth a fascicular cambium is formed from procambium cells present between xylem and phloem The cambium gives rise at the phloem side to new cells that differentiate to phloem elements.