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Detail cross section of an old stem of castor bean

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1  vascular cambium ring
3  xylem
4  parenchyma
2  phloem

English name: Castor bean
Scientific name: Ricinus communis
Familia: Euphorbiaceae
Classis: Dicotyledonas
Phylum: Angiospermae
Regnum: Plantae
Cambium cells divide only in periclinal direction so that the newly formed cells are aligned in rows. These new cells differentiate to xylem (inward) and to phloem (outward)

last modified: 5 Jun 2014