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procambium

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pro·cam·bi·um  (pr-kmb-m)
n.
The primary meristem that gives rise to vascular tissue.
pro·cambi·al (-l) adj.
procambium [prəʊˈkæmbɪəm]
n
(Life Sciences & Allied Applications / Botany) undifferentiated plant tissue, just behind the growing tip in stems and roots, that develops into conducting tissues
[from pro-2 + cambium]
procambial  adj
procambium  (pr-kmb-m)
The primary meristem in vascular plants that gives rise to primary vascular tissues (phloem and xylem).
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As the shoot grows, the leaf traces become displaced with reference to the center of the apex as a consequence of the PTM and the elongation of procambium in the plane of the highest number of cell divisions, which must necessarily be circumferential.
Fossil Cycadales of Argentina by Artabe, Analia E / The Botanical Review
Abrupt" root vascular connections (Botrychium, Osmunda) show no such continuity of procambium and protoxylem; they develop at levels where the vascular tissue of the stem is maturing or mature.
Anatomy and development of the fern sporophyte by White, Richard A.; Turner, Melvin D. / The Botanical Review
 
 
 
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