- plant anatomy
- exact: procambio (Spanish)
- exact: 前形成層 (Japanese)
- A portion of meristem tissue (PO:0009013) that undergoes differentiation to form the primary vascular tissue (PO:0025408). [source: ISBN:0471244554]
- May occur in an apical meristem or in a developing phyllome. Gives rise to the primary xylem and primary phloem. This term replaces PO:0006074.
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