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2001, Economic Botany
Usnea is a widespread fruticose lichen popularly known for its medicinal properties across the world. Though it has been mentioned in many floristic studies reported from Uttarakhand, India, no detailed taxonomic account has been conducted for the past two decades. The present study was based on specimens deposited in lichen herbarium of National Botanical Research Institute (LWG), personal herbarium of D.D. Awasthi (AWAS) and herbarium of the department of botany, Lucknow University (LWU). A total of 28 species, including seven new additions to Uttarakhand, namely U. dendritica Stirt., U. lucea Mot., U. norketti G. Awasthi, U. pseudosinensis Asahina, U. sinensis Mot., U. spinosula Stirt., U. subflorida Stirt.are presented along with key to species.
Parmelioid lichens are a diverse and ubiquitous group of foliose lichens. Generic delimitation in parmelioid lichens has been in a state of flux since the late 1960s with the segregation of the large, heterogeneous genus Parmelia into numerous smaller genera. Recent molecular phylogenetic studies have demonstrated that some of these new genera were monophyletic, some were not, and others, previously believed to be unrelated, fell within single monophyletic groups, indicating the need for a revision of the generic delimitations. This study aims to give an overview of current knowledge of the major clades of all parmelioid lichens. For this, we assembled a dataset of 762 specimens, including 31 of 33 currently accepted parmelioid genera (and 63 of 84 accepted genera of Parmeliaceae). We performed maximum likelihood and Bayesian analyses of combined datasets including two, three and four loci. Based on these phylogenies and the correlation of morphological and chemical characters that characterize monophyletic groups, we accept 27 genera within nine main clades. We re-circumscribe several genera and reduce Parmelaria to synonymy with Parmotrema. Emodomelanelia Divakar & A. Crespo is described as a new genus (type: E. masonii). Nipponoparmelia (Kurok.) K.H. Moon, Y. Ohmura & Kashiw. ex A. Crespo & al. is elevated to generic rank and 15 new combinations are proposed (in the genera Flavoparmelia, Parmotrema, Myelochroa, Melanelixia and Nipponoparmelia). A short discussion of the accepted genera is provided and remaining challenges and areas requiring additional taxon sampling are identified.
This paper presents a taxonomic treatment of Parmotrema lichens (Ascomycota, Parmeliaceae) collected in the Philippines at high altitudes where they abound, particularly in the mountainous regions of northern Luzon and Mindanao. A total of 30 Parmotrema species were identified: twelve being new records. Results suggest that the Philippines has a potentially rich unknown lichen diversity that remains to be further investigated. Many lichen species are restricted to unexplored forested areas, which in the Philippines are facing alarming degradation; hence, it is extremely important for these habitats to be conserved.
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MEDICINAL LICHENS OF INDIA2010 •
A total of 137 lichens having medicinal properties and occurring in India are enumerated, of which 36 species are used in traditional medicine either in India or elsewhere, 55 have been screened for antimicrobial activity, about 57 for antioxidant property while about 37 species for anti-cancer and cytotoxicity. The macrolichens (foliose and fruticose lichens) were mostly utilized for medicine value. Cetraria islandica, Cladonia rangiferina, Evernia prunastri, Everniastrum cirrhatum, Hypogymnia physodes, Parmotrema chinense, Peltigera canina and Usnea longissima are the widely exploited in different parts of the world in traditional medicine and for biological screening. A brief description of the lichen taxa, its distribution in India and its utilization is provided in the enumeration.
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Nordic Journal of Botany
A review of the lichen family Parmeliaceae - history, phylogeny and current taxonomy2012 •
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