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Mar 25, 2021 · Usnea sp. decoctions were used in Scandinavia for bathing babies' or adults chapped skins. In Spain, Usnea sp. was used for the treatment of foot cracks or irritants. Usnea sp. were also used in different parts of the world (Asia, Africa, and Europe) for fever control and pain relief (Okuyama et al., 1995).
Usnea, Usnea Barbata. Usnea is a generic name for several lichen species, which grow and hang from trees. Due to its antibiotic properties, it has been used medicinally for thousands of years. Chinese medicine regards it as effective in the treatment of surface infections and skin ulcers.
Twenty different Usnea lichen species growing in Western Ghats of India. Usnea is a pale greyish–green fruticose lichen. It is popularly called as “Old-man's Beard” (Basiouni et al., 2020). It is of the family Parmeliaceae. Lichen is a symbiont of algae and fungi.
Usnic acid is a broad-spectrum antibiotic produced from Usnea and Cladonia species that is used to treat a variety of bacterial infections, especially staph infections (Timbreza et al., 2017). Astringents such as Usnea and Evernia furfuracea have been used to cure hemorrhages in the past (Llano, 1948).
Usnic acid is a yellow cortical pigment that, depending on the angular methyl group's projection at the chiral 9b position, exists in two enantiomeric forms (+)usnic acid and (–)usnic acid [ 136 ]. Usnic acid has been found in various species of lichen genera, such as Usnea, Lecanora, Cladonia, Evernia, Parmelia, Alectoria and Ramalina.
Mar 25, 2021 · Usnea sp. extracts contain compounds other than usnic acid as well with biological effects. Usnea barbata is a species that has been employed in modern-day cosmetic and pharmaceutical preparations. The information presented in the review can be considered as a source of knowledge about the Usnea sp.
Jan 1, 2023 · As a traditional Chinese herbal medicine, Usnea was widely applied to treat malaria, wounds, and cough in the form of dressing or decoction since 101 BCE. Previous research mainly focused on secondary metabolites (depsides and depsidones) from Usnea, while fewer reports pay attention to lichenan (Prateeksha et al., 2016).
Feb 1, 2019 · With the exception of Mark et al. (2016), where false specimen identification biased the results (Clerc, 2016, Clerc and Otte, 2018), previous molecular studies about Usnea (Kelly et al., 2011, Ohmura, 2008, Saag et al., 2011, Truong et al., 2013a, Wirtz et al., 2008) showed that species described based on morphological and chemical characters are usually monophyletic, thus suggesting that the ...
Apr 4, 2018 · Introduction. The fruticose lichen Usnea baileyi belongs to the Usnea genus, one of the most popular genera occurring in high-attitude Vietnam forests. Previous phytochemical studies on this lichen reported the presence of several metabolites as xanthones, 5 depsidones and depsides6, 7 along with the major component, usnic acid.
Oct 15, 2023 · Usnea longissima is red listed as vulnerable and protected by law in Sweden. Short dispersal distances, causing a strong association with humid old-growth forests, and high habitat specialization contribute to the rarity of U. longissima (Gauslaa et al., 2007, Strother et al., 2022, Esseen and Ekström, 2023).
