| Hairs and glandular cells in the upperepidermis of a petunia leaf |
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1 epidermal cells
3 multicelllular hair
4 secretory cells at the tip of a hair
2 stomata
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English name: Petunia
Scientific name: Petunia sp.
Familia: Solanaceae
Classis: Dicotyledonas
Phylum: Angiospermae
Regnum: Plantae
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| Hairs often occur at the surface of leaves as a protection against desiccation of pray. Hairs are elongated extensions (trichomes) of the epidermis. This particular hair of a petunia leaf is multicellular. At its top a secretion cell produces etherical oils that desists many organisms |