Epidermis

The outermost tissue of leaves and herbaceous stems. The epidermis usually consists of a single layer of cells, often protected by a layer of wax. The pattern of cells, similar to that of a jigsaw puzzle, is often characteristic of a particular species , and can be used during research for plant identification in animal feces, and in certain forensic situations. Stomata are a component of the epidermis. Epiphyte

A plant that lives on another plant without being parasitic. For example, moss and lichen growing on a branch of a tree are epiphytes.

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