Sticta

Sticta is a genus of lichens in the family Lobariaceae. The genus has a widespread distribution, especially in tropical areas, and includes about 114 species. These lichens have a leafy appearance, and are colored brown or black. Sticta species with cyanobacteria as photobionts can fix nitrogen from the atmosphere, and due to their relative abunda...
Found on http://en.wikipedia.org/wiki/Sticta

Sticta

Sticta is a genus of lichens of the family Parmeliaceae. They are mainly tropical in distribution, leaf-like in growth, with a leathery texture. Dyes are obtained from many of the species.
Found on http://www.probertencyclopaedia.com/browse/BSB.HTM
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