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Transverse section of the outer portion of the Allium root
Legend:
1 epidermis
3 cortex
2 exodermis
English name: Onion
Scientific name: Allium cepa
Familia: Liliaceae
Classis: Monocotyledonas
Phylum: Angiospermae
Regnum: Plantae
The epidermis is and the exodermis, the outer layer of cortical cells, has taken over the function of the epidermis.
