This monumental work by the world's preeminent authority on Arctic floras--the first comprehensive, up-to-date botanic manual for this region--is the product of the author's more than forty years of study of circumpolar floras. The book describes and illustrates all flowering plants and vascular cryptograms known to occur in Alaska, the Yukon, the Mackenzie District, and the eastern extremity of Siberia. Some 1,974 taxa, belonging to 1,559 species, occur in this region; all are described. For 1,735 of these, the book provides detailed description, nomenclature, plant drawing, and range maps. In each case, one map gives distribution in the Alaskan region; a second, on circumpolar projection, gives worldwide range. This volume is the first major flora to assemble such comprehensive range data and to provide such maps. An analytic key to all species described is provided for each genus, and there is an artificial key to families. An Introduction describes the past and present climatic, geologic, and ecologic character of the regions covered, the history of botanical collection in these regions, and the book's treatment of botanical and taxonomic details; and lists the plants of neighboring regions likely to occur. Glossary, plant authors' list, bibliography, and indexes are provided. The superb drawings were prepared by Dagny Tande-Lid, and eight pages of illustration in color are included.

The Santa Cruz Mountains, an area covering almost 1,400 square miles from San Francisco southward to the Monterey County line, are a part of the Coast Range of Central California. The Mountains and the adjacent lowlands have a rich vascular flora, and about 1,800 species, subspecies, varieties, forms, and hybrids of ferns, conifers, and flowering plants, distributed among 168 families, have been reported from the region. This comprehensive flora, the first of the area, is designed for use by both the serious beginner and the trained botanist. The flora is illustrated by 250 line drawing and ten photographs. In addition, there is a map of the Santa Cruz Mountains area and a stratigraphic profile of the rock formations. The stratigraphic profile and a section on geology have been contributed by Dr. Earl E. Brabb of the United States Geological Survey. Distributional notes, keys to families, genera, and species, pertinent synonymy, a glossary of technical terms, an index of place names, and common0name and scientific-name indexes form the body of the text. The Introduction contains a description of the geography of the Santa Cruz Mountains and adjacent lowlands, seconds on the geology and climate, a brief discussion and analysis of the vegetation and floristic affinities of the area, and a history of past botanical collecting. A selected list of references has been appended to allow the interested individual to pursue his studies further.

This work covers geology and vegetation of the vascular plants of the Yukon Territory. It should be of interest to botanical scientists, students and travellers interested in biodiversity, and for rare and endangered species wildlife management.

Manual of endangered taxa, threatened taxa, rare taxa with undetermined status, and taxa withdrawn from consideration in Alaska. Each species includes description of plant and its habitat as well as map showing distribution.