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Cross-section through a leaf of ivy

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1  upper epidermis
3  triple-layered palisade parenchyma
spongy parenchyma
5  air cavities
7  guard cells
8  cavity below the guard cells
9  minor vein
2  cuticle
6  lower epidermis

English name: Ivy
Scientific name: Hedera helix
Familia: Araliaceae
Classis: Dicotyledonas
Phylum: Angiospermae
Regnum: Plantae
The leaf of ivy has a well-developed epidermis at the sun side and a thick cuticle which provides protection against desiccation. The leaf has a multilayered palisade parenchyma; the number of layers depends on the availability of light. The stomata are mainly located at the shade side. Here they are clearly visible in closed state. Also the wall thickenings of the stomata are distinct. The cavity behind the stomata (substomatal chamber) is small.

last modified: 5 Jun 2014