Secondary Growth and Wood anatomy

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Secondary Growth and Wood anatomy

• Stems with little secondary growth
• Stems with much secondary growth
• Secondary xylem of large stems
• Secondary growth in roots

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Helianthus older stem
Pith
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Tilia basswood, one year old
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Tilia basswood 2 years
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Tilia basswood 3 years
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Tilia 3 years closeup
Late wood vessels
Early wood vessels
Ray
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Two Parenchyma in conifers
Ray parenchyma
Axial parenchyma
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Pinus - cross
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Pinus - radial
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Pinus - tangential
Rays
Tracheids
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Oak Quercus - Cross
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Oak Quercus - radial
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Acer - cross
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Acer - Radial
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Tilia root page 23