This revision of the grasses of Chihuahua includes 385 species in 95 genera, 15 subspecies, 29 varieties, and 4 forms. Included are keys for determination, detailed descriptions, nomenclatural synonyms, ecological information on habitat, distribution based on herbarium specimens, and illustrations for 251 species and 8 varieties. A new combination for Cenchrus polystachios subsp. setosus is also published.
Species of coralline algae of the genus Phymatolithon that occur in the Boreal–Subarctic transition zone of the North Atlantic are segregated systematically by a statistical/developmental analysis of their morpho-anatomical characters. Variations in vegetative tissue morphology, particularly with respect to cell division and elongation patterns, as well as variation in conceptacle (reproductive structure) location and development, are the result of a complex of genetic and environmental factors.
This volume brings together papers presented at “The Age of Plastic: Ingenuity + Responsibility,” a Smithsonian symposium hosted by the Museum Conservation Institute on June 7–8, 2012. The event was conceived as a cross-disciplinary
exploration of plastic as technological material, cultural phenomenon, preservation challenge, and force on the environment. Writers, scientists, conservators, historians, filmmakers, designers, and policy makers offer researched and first-hand accounts from life in the Plastic Age.