Note to the Reader
The scientific names of some plants have changed since these essays
were first published. In such cases we have included the present nomen-
clature in brackets immediately following the plant name. Our sources
of reference were The Royal Horticultural Society Dictionary of Gar-
dening, Royal Horticultural Society Plant Finder, Manual of Woody Land-
scape Plants by Michael A. Dirr, and Herbaceous Perennial Plants by
Allan M. Armitage.