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Lichen Forms

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by

Clarissa Stiles

on 22 April 2010

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Transcript of Lichen Forms

Lichen GROWTH FORMS FOLIOSE FRUTICOSE SQUAMULOSE Squamulose lichens have scale-like lobes called squamules that are usually small and overlapping. Foliose lichens are somewhat leaf-like, composed of lobes. They are relatively loosely attached to their substrates, usually by means of rhizines. Their lobes have upper and lower sides and usually grow more-or-less parallel to the substrate. Umbilicate lichens are attached to their substrate only at a central point. Fruticose lichens are the most three-dimensional. They're ususally round in cross secetion (terete), and most are branched. They can be like little shrubs growing upward, or they can hang down in long strands. CRUSTOSE Crustose lichens form crusts that are so tightly attached to the rocks, trees, sidewalks, or soils they grow on that they can't be removed without damaging the substrate. http://www.lichen.com/vocabulary.html
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