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Transverse section through the central cylinder in the aerial root of an epiphytic orchid

Legend:

1  cortex
3  phloem
4  xylem
5  pith
2  endodermis

English name: Orchid
Scientific name: Oncidium sp.
Familia: Orchidaceae
Classis: Monocotyledonas
Phylum: Angiospermae
Regnum: Plantae

Transverse section through an epiphytic orchid's aerial root; Central cylinder