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Detail cross section of an young stem of castor bean

Legend:

1  fascicular cambium
3  cortex
2  phloem

English name: Castor bean
Scientific name: Ricinus communis
Familia: Euphorbiaceae
Classis: Dicotyledonas
Phylum: Angiospermae
Regnum: Plantae

In the young cortex no support tissue is yet present