This compendium deals with the ecology and economic importance of the poplars, willows, hickories, birches, beeches, oaks, elms, nettles, sorrels, docks, and smartweeds growing in New York's Catskills. Provided are keys for identifying each plant to species by flowers, foliage, or winter buds. A line drawing accompanies a summary of basic data concerning each species' habitat, range, growth habit, origin, and flowering time. In addition, maps and annotations delineate species distribution by Catskill township. Also discussed for each plant are uses in medicines and dyes, as food for humans and livestock, in construction, and for other purposes. (WB)