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Sticta
''Sticta'' is a genus of lichens in the family Lobariaceae. The genus has a widespread distribution, especially in tropical areas, and includes about 114 species. These lichens have a leafy appearance, and are colored brown or black. ''Sticta'' species with cyanobacteria as photobionts can fix nitrogen from the atmosphere, and due to their relative abundance and high turnover, they contribute appreciably to the rainforest ecosystem. They are commonly called spotted felt lichens.〔Plant Profile for Sticta (spotted felt lichen), USDA, ()〕
==Description==
The vegetative bodies of the ''Sticta'', the thalli, are foliose, or leafy in appearance. They typically have dimensions of in diameter, although specimens with diameters of up to have been recorded. The lobes are rounded, and the upper surface is black or brown, while the lower surface has a light to dark brown layer of fine hairs (a ''tomentum''), with a few craters, called ''cyphellae''. Thalli often smell of shrimp or fish. The vegetative reproductive structures called isidia or soredia are often present on species in this genus; apothecia (cup-shaped fertile spore bearing structures) are rarely found. ''Sticta'' species are usually found growing on bark, wood, or mossy rock.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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