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Cross-section through the stomata and trichomes of a lilac
Legend:
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.
