Xanthoparmelia Plittii

	Xanthoparmelia Plittii ''Xanthoparmelia plittii'' is a lichen which belongs to the ''Xanthoparmelia'' genus. Description ''Xanthoparmelia plittii'' grows to around 4-10 cm in diameter with irregularly lobate lobes which are approximately 0.5-2 mm wide. The upper surface of the lichen is yellow-green with a smooth and shiny surface. While the lower surface being pale or medium brown in color with moderate to densely packed rhizinate anchoring the lichen to the surface. Habitat and range ''Xanthoparmelia plittii'' has been observed mostly in North America, but has been found in South America and Europe as well. Chemistry ''Xanthoparmelia plittii'' has been found to contain usnic acid Usnic acid is a naturally occurring dibenzofuran derivative found in several lichen species with the formula C18H16O7. It was first isolated by German scientist W. Knop in 1844 and first synthesized between 1933-1937 by Curd and Robertson. Usnic a .... See also * List of ''Xanthoparmelia'' species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Xanthoparmelia ''Xanthoparmelia'' (commonly known as green rock shields or rock-shield lichens) is a genus of foliose lichen in the family Parmeliaceae.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, ''Xanthoparmelia'' is synonymous with ''Almbornia'', ''Neofuscelia'', ''Chondropsis'', ''Namakwa'', ''Paraparmelia'', and ''Xanthomaculina''. This genus of lichen is commonly found in the United States, as well as Australia, New Zealand and Ecuador. The name means 'golden yellow parmelia'. The photobiont (photosynthetic partner) is '' Trebouxia'' (a genus of green algae). Identification Distinguishing between species involves how much they are attached to the substrate, whether or not isidia are present, lower surface color, and chemical spot tests. All members of the genus react to spot test as K-, KC+ yellow, with medulla reaction varying from species to species. Species Species include: * '' Xanthoparmelia chlorochroa'' * ''Xanthoparmelia conspersa'' (''P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Usnic Acid Usnic acid is a naturally occurring dibenzofuran derivative found in several lichen species with the formula C18H16O7. It was first isolated by German scientist W. Knop in 1844 and first synthesized between 1933-1937 by Curd and Robertson. Usnic acid was identified in many genera of lichens including ''Usnea'', ''Cladonia'', ''Hypotrachyna'', ''Lecanora'', ''Ramalina'', ''Evernia'', ''Parmelia'' and '' Alectoria''. Although it is generally believed that usnic acid is exclusively restricted to lichens, in a few unconfirmed isolated cases the compound was found in kombucha tea and non-lichenized ascomycetes. At normal conditions, usnic acid is a bitter, yellow, solid substance. It is known to occur in nature in both the d- and l-forms as well as a racemic mixture. Salts of usnic acid are called usnates (e.g. copper usnate). Biological role in lichens Usnic acid is a secondary metabolite in lichens whose role has not been completely elucidated. It is believed that usnic acid protect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	List Of Xanthoparmelia Species This is a list of species in the foliose lichen genus ''Xanthoparmelia''. It is the most speciose lichen genus, containing an estimated 822 species as of 2020. The key characteristics of ''Xanthoparmelia'' include the cell walls containing ''Xanthoparmelia''-type lichenan, the pored epicortex, margins without cilia, simple rhizines, small, ellipsoidal spores and bifusiform or rarely weakly fusiform or bacilliform conidia. A '' Xanthoparmelia abraxas'' – South Africa ''Xanthoparmelia acrita'' – Africa '' Xanthoparmelia adamantea'' '' Xanthoparmelia adhaerens'' '' Xanthoparmelia adlerae'' – South America ''Xanthoparmelia adpicta'' ''Xanthoparmelia adusta'' '' Xanthoparmelia affinis'' '' Xanthoparmelia africana'' – Africa '' Xanthoparmelia afroincerta'' '' Xanthoparmelia afrolavicola'' '' Xanthoparmelia agamalis'' '' Xanthoparmelia aggregata'' – Africa '' Xanthoparmelia ahtii'' '' Xanthoparmelia ajoensis'' '' Xanthoparmelia albomaculata'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]