Book ID: 9745
THOMSON, John W.
The Lichen Genus PHYSCIA in North America. 1963. (Nova Hedwigia, Beih. 7). 1 fig. 36 maps. 25 plates. 212 p. gr8vo. Paper bd. (ISBN 978-3-7682-5407-6)
Contents (abbr.): Introduction/ History of the Genus Physcia/ Morphology/ Chemistry/ Geographical Distribution/ Phylogeny/ Artificial Key to the North American Species of Physcia/ Systematic Treatment:Family Physciaceae: Genus Physcia DC. Key to the Groups of Physcia.Subgenus Euphyscia. Section Macrosperma (Vainio) Maas G. Section Brachysperma. Subsection Albida. Group Tenella. G.Stellaris, G.Astroidea, G.Caesia, G.Tribacia, Subsection Sordulenta: G.Obscura,G.Pulverulenta, Subgenus Hypomelaena/ Doubtful and excluded species/References/ Index.