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Cross-section of an old stem of castor bean


1  lenticells
3  collenchyma
4  parenchyma
5  phloem primary/secondary
7  secondary xylem
parenchyma rays
primary xylem
2  epidermis
6  vascular cambium

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

Fascicular cambium forms xylem to the internal side and phloem to the external side. Alignment of cells in rows is typical for tissue of secondary origin (secondary growth). View a detail of cambium at this stage.

last modified: 5 Jun 2014