A brief item in the Wilmington Commercial shows, that at least one member of the CentenI nial Commission of this State is alive to the advantage of having one of the most important resources of Delaware properly displayed at the 'approaching exhibition. I allude to the state-ment that Col. H. B. Fiddeman has found that we have "twenty-nine varieties" of native trees, and that "they will all be exhibited at the Centennial."

If sections of all our trees could be prepared so as to properly show their qualities for various useful or ornamental purposes, our wealth in this respect, would, I think, astonish some of our own citizens and be of interest to those from other States and countries. For if Col. Fidde-man had been able to extend his researches throughout the State, he would have found that we have at least sixty-six distinct species of trees that are native to Delaware soil. In this number are included four species of the Ash, two of the Elm, two of the Walnut, five of the Hickory, thirteen of the Oak, three of the Birch, three of the Poplar or Aspen, (not the Tulip Poplar,) and four of the Pine, besides other genera which are each represented by a single species.

In the list below, all trees which attain a less diameter of trunk than six inches are excluded as are also all such as are natives of other portions of the United States, but of recent introduction here, though gradually making themselves at home, as, for example, the Catalpa, Honey Locust, etc. A single tree in the list is to me very doubtful as a native of Delaware, viz., the common Locust; but as Mr. Tatnall (in his "Catalogue of the Plants of New Castle County,") and Col. Fiddeman think otherwise, I have acquiesced.

It may not be inappropriate to say that Dr. Geo. Vasey, the Government Botanist at Washington, will exhibit at the Centennial, specimens of about four hundred and fifty of the native woods of the United States.

The Latin names as well as the English are here given, for the reason that the former are stable and recognized all over the world, while a single one of the latter is often applied in different sections of the country to two very distinct species. Thus, what is called "Red Oak" in Delaware, is called "Spanish Oak" in Pennsylvania, while the Spanish Oak of Delaware is scarcely known in Pennsylvania: