A lichen

Posted by ROSHAN B.S on Aug. 25, 2014, 7:40 p.m.

A lichen (/?la?k?n/,^[1] sometimes /?l?t??n/ ^[2]) is a composite organism consisting of a fungus (the mycobiont) and a photosynthetic partner (the photobiont or phycobiont) growing together in a symbiotic relationship.