Today I shot Alison Proctor and Phoebe Cummings for Siobhan Davies’ Human Nature Season. They created Lichen out of reclaimed clay, then we visited Bob at the South London Botanical Society in Tulse Hill.
A lichen (/ˈlaɪkən/, sometimes /ˈlɪtʃən/ ) is a composite organism consisting of a fungus (the mycobiont) and a photosynthetic partner (the photobiont or phycobiont) growing together in asymbiotic relationship. The photobiont is usually either a green alga (commonly Trebouxia) orcyanobacterium (commonly Nostoc). The morphology, physiology and biochemistry of lichens are very different from those of the isolated fungus and alga in culture. Lichens occur in some of the most extreme environments on Earth—arctic tundra, hot deserts, rocky coasts, and toxic slag heaps. However, they are also abundant as epiphytes on leaves and branches in rain forests and temperate woodland, on bare rock, including walls and gravestones, and on exposed soil surfaces (e.g., Collema) in otherwise mesic habitats. The roofs of many buildings have lichens growing on them. [Source Wikipedia]