Flora of the Pacific Northwest, first published in 1973, became an instant classic for its innovative style of providing species descriptions in the identification keys, and for its comprehensive illustrations of nearly all treated taxa (species, subspecies, and varieties). Students rely on it as an essential primer, while veteran botanists and natural resource managers use it as the definitive reference for the region�s flora. This completely revised and updated edition captures the advances in vascular plant systematics over the decades since publication of the first edition. These advances, together with significant changes in plant nomenclature, the description of taxa new to science from the region, and the recent documentation of new native and nonnative species in the Pacific Northwest required a thorough revision of this authoritative work. Flora of the Pacific Northwest covers all of Washington, the northern half of Oregon, Idaho north of the Snake River Plain, the mountainous portion of western Montana, and the southern portion of British Columbia. It accounts for the wild-growing native and introduced vascular plants falling within those boundaries and includes: Treatment of 5,545 taxa (more than 1,000 taxa added from the first edition) Illustrations for 4,716 taxa (1,382 more than the first edition) Nomenclature changes for more than 40 percent of the taxa included in the first edition These enhancements make this new edition the most comprehensive reference on Pacific Northwest vascular plants for professional and amateur botanists, ecologists, rare plant biologists, plant taxonomy instructors, land managers, nursery professionals, and gardeners.

Discover the wonders of Washington’s complex ecosystem with this field guide to the district’s parks, gardens, urban forests and more. Every neighborhood of Washington, D.C., is home to abundant wildlife, and its large park network is rich in natural wonders. A hike along the trails of Rock Creek Park, one of the country’s largest and oldest urban forests, quickly reveals white-tailed deer, eastern gray squirrels, and little brown bats. Mayapples, Virginia bluebells, and red mulberry trees are but a few of the treasures found growing at the National Arboretum. A stroll along the Potomac and Anacostia Rivers might reveal stealthy denizens such as bullfrogs, largemouth bass, and common snapping turtles. In Field Guide to the Natural World of Washington, D.C., naturalist Howard Youth takes readers on an urban safari, describing the wild side of the nation’s capital. Detailed drawings by Carnegie artist Mark A. Klingler and photography by Robert E. Mumford, Jr., reveal the stunning color and beauty of the flora and fauna awaiting every D.C. naturalist. Residents and tourists alike will find this guide indispensable, whether seeking a secluded jog or an adventurous outing away from the noise of the city.

Featuring more than 1240 stunning color photographs, this comprehensive field guide will remain a trusted, authoritative trailside reference for years to come.

The aim of this work was to furnish to botanists exploring the locality [of Washington, D.C.] and as an aid to beginners in practical botany. The extent of territory which has of late years been tacitly recognized by botanists here as constituting the area of what has been called "Flora Columbiana" is limited on the north by the Great Falls of the Potomac, and on the south by the Mount Vernon Estate, in Virginia, and Marshall Hall, just opposite this on the Marlyland side of the river, while it may reach back from the river as far as the divide to the east, where the waters fall into the Chesapeake Bay, and as far west as the foot of the Blue Ridge, so as not to embrace any of the peculiarly mountain forms.

Annotated selected list of floras and floristic works relating to vascular plants, including bibliographies and publications dealing with useful plants and vernacular names.