In the January number of the Horticulturist the culture of the "Sweet Gum tree" (Liguidambar styraeiftua) is recommended. This is well, and we hope it will be commonly cultivated; because it is indeed a hardy, beautiful tree, quite common in the Middle and Southern States from Pennsylvania to Florida. There are many other American trees and shrubs highly ornamental, which we would be glad to see in general cultivation, among which is the Rhus cotinoidcs of Nuttall, resembling, as its name indicates, the Rhus cotinus, or "Purple Fringe tree," a native of the south of Europe and Middle Asia, which is quite common in pleasure-grounds in this country. Nuttall discovered the Rhus cotinoidcs on the high rocky bonks of Grand river, Arkansas, where he obtained specimens of it in fruit only, which he deposited in the herbarium of the American Academy of Science at Philadelphia.

On the 6th of April, 1842, we found it both in flower and fruit, in descending the mountain on the road from Blountsville to Huntsville, in North Alabama. It was from two and a half to three miles south of the ferry on the Tennessee river, from which the Madison turnpike leads to Huntsville. There was an open space on the rocky side of the mountain, on which were many lilac-like shrubs of this beautiful Rhus, mostly in fruit, nearly all of which was abortive and covered with numerous hairy, shaggy-like pedicels, which render this Rhus so very ornamental. Next day we met it again in the woods, near the residence of a Mr. Bailus, twelve miles from Huntsville, on the road to Salem and Winchester, in Tennessee. Here it attained the size of a tree at least a foot in diameter, and from thirty to forty feet in height I have been thus particular in describing these localties, in hope that some one will introduce it into cultivation. It certainly is equal in beauty to the Rhus cotinus. It is larger, and its leaves are larger and more oblong. It flowers at least six weeks earlier, allowing for the difference in climate. We saw the common Locust, ( Robinia pseudo-acacia,) which is indigenous in the mountains of Alabama and Tennessee, in flower at the same time.

S. B. Buckley. - West Dresden, N. Y.