The Vascular Flora of Pennsylvania
The Vascular Flora of Pennsylvania

Author: Ann Fowler Rhoads

Publisher: American Philosophical Society

Published: 1993

Total Pages: 658

ISBN-13: 9780871692078

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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.

Geology Field Trips in and around the U. S. Capital
Geology Field Trips in and around the U. S. Capital

Author: Christopher S. Swezey

Publisher: Geological Society of America

Published: 2020-03-26

Total Pages: 114

ISBN-13: 0813700574

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"This volume contains four guides associated with the 2020 GSA Southeastern and Northeastern Sections Joint Meeting in Reston, Virginia. The localities of these four field trips include various locations in Virginia, Maryland, and West Virginia"--

Rockhounding Delaware, Maryland, and the Washington, DC Metro Area
Rockhounding Delaware, Maryland, and the Washington, DC Metro Area

Author: Robert Beard

Publisher: Rowman & Littlefield

Published: 2015-06-01

Total Pages: 289

ISBN-13: 149301496X

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With this informative guide, you can explore the mineral-rich areas' of Delaware, Maryland, and Washington D.C., from the beaches to the mountains. It describes the areas' best rockhounding sites and covers popular and commercial sites as well as numerous little-known areas. This handy guide also describes how to collect specimens, includes maps and directions to each site, and lists rockhound clubs. Rockhounding Delaware, Maryland, and Washington D.C. offers a complete introduction to this many-faceted hobby and is an invaluable sourcebook.