The PA Flora Database (PFD) has its roots in the work of Edgar Wherry, John Fogg, Jr., and Herbert Wahl, the "Atlas of the Flora of PA", pub. by the Morris Arboretum of the Univ. of PA. Over a period of 40 years, Wherry and his colleagues gathered data from the major PA herbaria and manually placed a quarter of a million dots on over 3,500 maps, which are reproduced in this volume. The checklist of included taxa has undergone extensive review to reflect recent taxonomic and nomenclatural revisions. Recent discoveries have been added and distribution data has been updated. This volume also includes collections made in the 1990s in conjunction with the PA Natural Diversity Inventory. Extensive illustrations. Reprinted 1996.

Designed especially for winter use and featuring almost six hundred illustrations, this taxonomic guide describes some nine hundred plant species by their twig, bud, and bark characteristics. All the trees, shrubs, and woody ground covers that grow without aid of cultivation in the Southeast are presented here, in a single reference.

This guide to common and unique plants found in forests of the Southeast thoroughly covers 330 species of forbs (herbaceous plants), grasses, vines, and shrubs, with a special emphasis on the plants role in wildlife sustenance. Packed with detailed color photographs, the book is a must-have for forest landowners, game and wildlife managers, biologists, outdoors enthusiasts, students--anyone with an interest in the intricate and often unexpected interrelationships between the flora and fauna of our regions forests. Features: Descriptions of native and nonnative (exotic or invasive) plants, including 330 species of forbs, in 180 genera: grasses, sedges, and rushes; woody vines and semiwoody plants; shrubs; palms and yucca; cane; cactus; ferns; and ground lichen 650 color photos Map of physiographic provinces 56 simple black-and-white drawings of flower parts, flower types, and inflorescences, leaf arrangements, leaf divisions, shapes, and margins, and parts of a grass plant Glossary Index of genera by family, index by wildlife species, and index of scientific and common names

Anyone who works with the vascular plants of Iowa—researchers, conservationists, teachers, agricultural specialists, horticulturists, gardeners, and so on—and those who are simply interested in knowing more about the state's plants have long felt a need for a comprehensive flora of Iowa. This meticulously researched volume is a giant first step toward such a flora. This book consists of an extended essay on the natural history of the vascular plants of Iowa, a discussion of their origins, a description of the state's natural regions, and a painstakingly annotated checklist of Iowa vascular plants. The data, which apply to over 150 years, took more than 15 years to collect. All known vascular plants that grow and persist in Iowa without cultivation are included in the checklist. These are native plants, primarily, but a large number of introduced species have become established throughout the state. Also included are Iowa's major crop plants and some of its common garden plants. The lengthy checklist provides an accurate and up-to-date listing of species names and common names, synonyms, distribution, habitat, abundance, and origin; county names are given for very rare species, and the most complete information has been provided for all rare plants and troublesome species. The wealth of information is this well-organized, practical volume—which describes more than two thousand species from Adiantum pedatum, the northern maidenhair fern of moist woods and rocky slopes, to Zannichellia palustris, the horned pondweed of shallow marshes and coldwater streams—makes it possible to identify Iowa plants correctly. All midwesterners will want to own a copy of The Vascular Plants of Iowa.

"Featuring more than fifteen hundred full-color photographs, this handy guide provides essential information on four hundred of the most troublesome weedy and invasive plants found in the southern United States"--P. [2] of cover.