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Cross-section through the stomata and trichomes of a lilac


1  epidermis
3  spongy parenchyma
4  air cavity
5  chloroplasts
7  guard cells
8  intercellular space below stoma
9  trichome
2  palisade parenchyma
6  guard cell

English name: Lilac
Scientific name: Syringa vulgaris
Familia: Oleaceae
Classis: Dicotyledonas
Phylum: Angiospermae
Regnum: Plantae

The stoma (notice the thick cell walls) of this lilac leaf is open and shows connections with a large air cavity (intercellular space). Chloroplasts (stained purple in this preparation) are numerous in the cells of the sponge parenchyma, but are absent in normal epidermal cells. The blue-colored multicellular trichome is an extension from the epidermis. Trichomes on the surfaces of lilac leaves are not hair-shaped.

last modified: 5 Jun 2014