Vascular Flora of Pennsylvania

"[T]he most detailed, comprehensive, and up-to-date reference on the distribution of the ferns, fern allies, conifers, and flowering plants known to occur in the Commonwealth… [This book] sets the standard for state level references on vascular plants."—Charles E. Williams, Pennsylvania Forests

"[A] valuable tool for conservation purposes…remarkably precise."—Lucinda Fleeson, Philadelphia Inquirer

"[A]n outstanding example of the potential for useful information from specimen databases."—G. Yatskievych, Flora of North America Newsletter

"[A] dream of a book…so large and so packed with documented information that it seems almost unbelievable that there could ever be such a wonderful book…a treasure trove."—Evelyn Anderson, Erie Times-News