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L is for Lichen – Word Up!

A fungus and an alga growing symbiotically (to the mutual benefit of one another) to form a pale green crinkly crust on walls, pots, trees and similar. Lichen normally appears in wetter areas where air pollution is low, and on trees whose health is already poor (although it is worth noting that lichen is not thought to cause further damage).

One thought on “L is for Lichen – Word Up!

  1. We have loads of lichens on the trees near us, so presumably our air-quality is good!
    Mark Willis recently posted…“A rolling stone gathers no moss”My Profile

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