Of the flowering plants, fifty are first-class trees, reaching a height of thirty feet and upwards ; thirty-four are second-class trees which attain a height of fifteen to thirty feet ; and sixty-nine are shrubs, all of which are growing without cultivation, a very few of which have been introduced.

The author would again call attention to what was stated in the beginning of this introduction, viz: all the plants named in this report are known to be growing within these limits without cultivation.

INTRODUCTION.

By including hardy trees and shrubs which have been introduced, and are growing in planted grounds, the list would be very much enlarged-

EXPLANATIONS.

The arrangement of this catalogne corresponds with that of the latest edition of Grafs Manual of the Northern United States, and the orders are numbered to agree with the numbers of the same orders in the Manual.

The words " Nat. Eu." mean the same as they do in the Manual, viz: that the plants after whose names they appear, have been introduced from Europe and are growing and propagating themselves freely without cultivation, and are fully established. " Adv. Eu." indicate that plants after whose names they are written, are from Europe ; that they are growing without cultivation, but are not propagating themselves with such freedom and constancy as to be considered fully established

AIDS AND SOURCES OF INFORMATION.

In the collecting of the material for this report, I have received valuable information and assistance from the Botanists of the county and New York city. One of the most valuable sources of information has been the Bulletin of the Torrey Botanical Club.