trichomes

Fine outgrowths or appendages on plants, algae, lichens, and certain protists. A unicellular or multicellular plant structure that forms a non-sclerified outgrowth from the epidermis

Trichomes, from the Greek τρίχωμα (trichōma) meaning "hair", are fine outgrowths or appendages on plants, algae, lichens, and certain protists. They are of diverse structure and function. Examples are hairs, glandular hairs, scales, and papillae. A covering of any kind of hair on a plant is an indumentum, and the surface bearing them is said to be pubescent.

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