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Flechte Definition

Lichen
(n.) One of a class of cellular, flowerless plants, (technically called Lichenes), having no distinction of leaf and stem, usually of scaly, expanded, frond-like forms, but sometimes erect or pendulous and variously branched. They derive their nourishment from the air, and generate by means of spores. The species are very widely distributed, and form irregular spots or patches, usually of a greenish or yellowish color, upon rocks, trees, and various bodies, to which they adhere with great tenacity. They are often improperly called rock moss or tree moss.
Lichen
(n.) A name given to several varieties of skin disease, esp. to one characterized by the eruption of small, conical or flat, reddish pimples, which, if unchecked, tend to spread and produce great and even fatal exhaustion.

lichen Bedeutung

lichen any thallophytic plant of the division Lichenes, occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.
manna lichen any of several Old World partially crustaceous or shrubby lecanoras that roll up and are blown about over African and Arabian deserts and used as food by people and animals
beard lichen
beard moss
Usnea barbata
greenish grey pendulous lichen growing on trees
horsehair lichen
horsetail lichen
any of several lichens of the genus Alectoria having a thallus consisting of filaments resembling hair
reindeer moss
reindeer lichen
arctic moss
Cladonia rangiferina
an erect greyish branching lichen of Arctic and even some north temperate regions constituting the chief food for reindeer and caribou and sometimes being eaten by humans
Iceland moss
Iceland lichen
Cetraria islandica
lichen with branched flattened partly erect thallus that grows in mountainous and Arctic regions, used as a medicine or food for humans and livestock, a source of glycerol
lichen any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks
lichen planus
lichen ruber planus
an eruption of shiny flat-topped purplish (usually itchy) papules on the wrist and forearms and thighs
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Als Flechte bezeichnet man eine symbiotische Lebensgemeinschaft zwischen einem Pilz, dem so genannten Mykobionten, und einem oder mehreren Photosynthese betreibenden Partnern. Diese Photobionten sind Grünalgen oder Cyanobakterien. Die Grünalgen bezeichnet man in der Symbiose auch als Phykobionten, die Cyanobakterien auch als Cyanobionten. Die Eigenschaften der Flechten setzen sich deutlich von jenen der Organismen ab, aus denen sie sich zusammensetzen. Erst in der Symbiose bilden sich die typischen Wuchsformen der Flechten heraus, und nur in Lebensgemeinschaft mit einem Photobionten bilden die Mykobionten die charakteristischen Flechtensäuren. Die Wissenschaft von den Flechten ist die Flechtenkunde oder Lichenologie.

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