All photographs copyright (2003-2013) by Kris H. Light

<strong>Lichen types</strong>

Lichens are dual kingdom organisms, although they are classified in the Kingdom Fungi. They are <u>not</u> plants, they are composed of algae and fungi living together in a symbiotic relationship. The fungus part (<em>m...
Lichen types

Lichens are dual kingdom organisms, although they are classified in the Kingdom Fungi. They are not plants, they are composed of algae and fungi living together in a symbiotic relationship. The fungus part (mycobiont) holds water and gives the lichen its shape; the algae (photobiont) make food by means of photosynthesis. more about lichens
There are 6 different types of lichen growth forms (the first 3 are the most commonly used among amateur naturalists):
Crustose - grows like a crust on trees or rocks
Foliose - leaf-like (the light green ones in this picture)
Fruticose - long, hairy lichens, often with cups

Squamulose - Thallus (main body of lichen) is scaly, shelf-like; the reproductive bodies are called podetia

Umbilicate - these lichens grow on rocks; they are attached at one point near the center by an "umbilicus"

Gelatinous - these lichens are a dark blue-green, black or brown; the thallus is jelly-like; they grow on trees or the ground, often associated with moss

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