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Lenticel in the bark of a young elderberry (presence of cork and collenchyma)

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Legend:

1  epidermis
3  cork cambium
4  collenchyma
5  lenticel
7  parenchyma
8  sclerenchyma
9  secondary phloem
2  cork 
6  phelloderm
10  cambium
11  secondary xylem
12 primary xylem

 
English name: Elderberry
Scientific name: Sambucus sp.
Familia: Caprifoliaceae
Classis: Dicotyledonas
Phylum: Angiospermae
Regnum: Plantae
Cross-section through a 1 year-old stem of elderberry. Gas exchange between the inner tissue and the surrounding is only possible at the lenticel, but not in other regions covered by cork.

http://www.vcbio.science.ru.nl/en/image-gallery/show/PL0120/print/

last modified: 5 Jun 2014