Thursday, May 24, 2012

Lichen on rock - Swedish Lapland

Lichens are not a plant actually, moreover a composite organism consisting of a fungus living in a symbiotic partnership with a photosynthetic partner, usually a green alga, or a cyanobacterium. Lychens occur in some of the most extreme environments on Earth - arctic tundra, hot deserts, rocky coasts, and toxic slag heaps.

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