Secondary Growth

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Secondary Growth Ch. 26
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Primary Growth ? increase in length/height Seconda
ry Growth ? increase in girth
Photo Credits D.J. Leopold
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Vascular Column
Eudicot stem
epidermis
cortex
vascular cambium
xylem
pith
phloem
vascular column xylem to inside phloem to
outside
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Axial and Radial Systems
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Secondary growth
Anticlinal divisions
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Bark -periderms cork cambium (or
phellogen) cork phelloderm -crushed phloem
ground tissue
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Photo Credits D.J. Leopold
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Photo Credits D.J. Leopold
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lenticels
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Wood sections -cross (transverse) -radial -tangent
ial
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Gymnosperm what section?
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Gymnosperm cross (transverse) section
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Gymnosperm what section?
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Gymnosperm radial section
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Gymnosperm what section?
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Gymnosperm tangential section
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Angiosperm cross (transverse) section
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Ring porous
Diffuse porous
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Angiosperm radial section
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Angiosperm tangential section