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Transverse section through the stem of a dicot

Legend:

1  epiderm
3  cortex parenchyma
4  central cylinder parenchyma
5  vascular bundles
7  protoxylem
8  phloem
9  sclerenchyma
2  collenchyma
6  metaxylem
10  cambium

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

Transverse section through the stem of a dicot. At the end of the primary growth a cambium layer is formed between the xyleme and the phloem, which builds a closed ring. This is the onset of secondary growth in which xylem (to the inner side) and phloem (to the outer side) arise from the cambium.


last modified: 5 Jun 2014