PREFACE. 
XV 
The Hop-tree (Ptelea trifoliata), and the Canadian Sumach (Rhus 
Canadensis) abound in the glades ; they are shunned by cattle and sheep, 
and serve the only benefit of shading the ground. The bark of the root 
of the former brings 15c, the latter 9c. 
Elephant’s Foot (Elephantopus toinentosus) is found everywhere along 
Walden’s Ridge and the Cumberland plateau. The herb, dried, brings 
10c per pound. I believe one person could collect 100 pounds in a day. 
My statements in regard to the existence, distribution and comparative 
abundance or scarcity of every species enumerated, are based upon my 
own personal observation and lifetime experience, extending over the 
whole State. Every plant embraced in this treatise is moreover repre- 
sented by herbarium-specimens in my collection, now in possession of the 
University of Tennessee, at Knoxville- 
I have to acknowledge the adoption of the Analytical Key from the latest 
edition of Gray’s Manual of Botany, and the specific descriptions as given 
by Gray, I. Bindley, DeCandolle, etc. The latest edition of the U. S. Dis- 
pensatory (1894) has also been consulted. 
The information given in this work is prominently to the interest of the 
pharmacists of the State, and commends itself to the attention of the State 
Pharmaceutical Association, which at its meetings could devise a plan to 
initiate the collection of the Medicinal Plauts. 
The Author. 
