Lovely, Lovely Leaves. Leaf arrangement OppositeDecussate.
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Lovely, Lovely Leaves
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Transcript of Lovely, Lovely Leaves. Leaf arrangement OppositeDecussate.
Leaf Sheath & Ligule (monocots)
Sheath
Ligule
•Intercalary meristemalso important inMonocots (esp.grasses)
Heterophylly
• Leaves may be quite different (e.g., in beans, juvenile leaves are entire, while adult leave are compound)
Xerophytes
•Thick cuticle•Sunken stomata•Reduced air spaces in mesophyll (succulent)•Trichomes – boundary layer humid•Multiple epidermal layers
Hydrophytes
•Thin cuticle•Lack characteristics for water conservation•Leaves often lobed (underwater)