0 a grey, green, or yellow plant-like organism that grows on rocks, walls, and trees
1 a type of organism that consists of an alga (= plant without leaves or roots) and a fungus (= plant without leaves, flowers, or color) growing together
The vanishing tropical rain forest as an environment for bryophytes and lichens.
An overview on lichenological investigations gives the background of the history of research on lichens since 1820.
The symbiotic state enables the lichen thallus to colonize extreme habitats where the separate bionts would not be able to survive.
Channel-imaging was correlated with contour images to improve recognition of visual damage, which reflects the vitality of the lichen tissue.
The results presented here emphasize the fact that lichen symbiosis shows an extremely high resistance to the simulated extreme space conditions used in our experiments.
The ability to map the distribution of lichens is more open to question.
The whole lichen thallus appears to be vital.
Maximum diameters of a crustose lichen mean that many small areoles or lobules form a conglomerate of thalli.