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Thelotrema Nostalgicum
''Thelotrema'' is a genus of lichen-forming fungi in the family Graphidaceae, the family to which all taxa in the former Thelotremataceae now belong. Members of the genus ''Thelotrema'' are commonly called barnacle lichens. Description ''Thelotrema'' lichens have a thallus with colours ranging from white to yellow-grey or light olive. The texture of the thallus can be smooth, uneven, or , with the presence of either an surface or a loosely to rarely dense to cortex. The and medulla frequently contain clusters of calcium oxalate crystals. The apothecia can be immersed or sessile and appear rounded or angular-rounded. The is partially covered by remnants of the , while the margin can be entire, undulate, or fissured, displaying a distinct double margin. The is absent in this genus. The excipulum is paraplectenchymatous, , and varies in colour from colourless to brown. It has distinct , and the are unbranched. ''Thelotrema'' are transversely septate to , fusiform-ellipso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thelotrema Lepadinum
''Thelotrema'' is a genus of lichen-forming fungi in the family Graphidaceae, the family to which all taxa in the former Thelotremataceae now belong. Members of the genus ''Thelotrema'' are commonly called barnacle lichens. Description ''Thelotrema'' lichens have a thallus with colours ranging from white to yellow-grey or light olive. The texture of the thallus can be smooth, uneven, or , with the presence of either an surface or a loosely to rarely dense to cortex. The and medulla (lichenology), medulla frequently contain clusters of calcium oxalate crystals. The apothecia can be immersed or sessility (botany), sessile and appear rounded or angular-rounded. The is partially covered by remnants of the , while the margin can be entire, undulate, or fissured, displaying a distinct double margin. The is absent in this genus. The excipulum is paraplectenchymatous, , and varies in colour from colourless to brown. It has distinct , and the are unbranched. ''Thelotrema'' are t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norstictic Acid
Norstictic acid is a depsidone produced as a secondary metabolites in lichens. The compound contains both an aldehyde carbonyl group and an adjacent hydroxyl In chemistry, a hydroxy or hydroxyl group is a functional group with the chemical formula and composed of one oxygen atom covalently bonded to one hydrogen atom. In organic chemistry, alcohols and carboxylic acids contain one or more hydroxy ... group in its molecular structure, which enables it to form complexes with certain metals. This property was demonstrated in studies of lichens growing on copper-rich substrates, where norstictic acid forms complexes with copper ions in the (outer layer) of the lichen thallus, resulting in a distinctive green-yellow coloration. The formation of these copper-norstictic acid complexes appears to be selective, as evidenced by comparing it to the structurally similar stictic acid, which lacks the adjacent hydroxy group and does not form copper complexes. This metal-binding capabi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thelotrema Australiense
''Thelotrema'' is a genus of lichen-forming fungi in the family Graphidaceae, the family to which all taxa in the former Thelotremataceae now belong. Members of the genus ''Thelotrema'' are commonly called barnacle lichens. Description ''Thelotrema'' lichens have a thallus with colours ranging from white to yellow-grey or light olive. The texture of the thallus can be smooth, uneven, or , with the presence of either an surface or a loosely to rarely dense to cortex. The and medulla frequently contain clusters of calcium oxalate crystals. The apothecia can be immersed or sessile and appear rounded or angular-rounded. The is partially covered by remnants of the , while the margin can be entire, undulate, or fissured, displaying a distinct double margin. The is absent in this genus. The excipulum is paraplectenchymatous, , and varies in colour from colourless to brown. It has distinct , and the are unbranched. ''Thelotrema'' are transversely septate to , fusiform-ell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |