In your last number you refer to European planters calling what is commonly known as Silver Spruce, Blue Spruce. This is an unfortunate mistake as the Engelmann and sub-alpina present the same beautiful glaucous appearance, though not as highly colored. At first and for years we called this Abies Menziensi, till we found it conflicted with the true Menzies of the Pacific coast. In correspondence with the late Dr. Engle-mann four years ago, he said the growers of the United States had concluded to adopt the nomenclature of Europe, where this tree was called Picea pungens, and changing those we had called Abies, like Douglasii, Engelmann, etc, to Picea, while the class to which sub-alpina belongs were called Abies, and we have since that time adopted the change.

Picea pungens which is found in some localities of a bright green, and others intensely blue, is the easiest tree to transplant among the Rocky Mountain Sylva, if taken up before the buds are much swelled. The writer has planted largely of this variety at stations of the Union Pacific railway in Nebraska, with best success, packing the roots in sacking with moss as soon as dug, and if the weather is very hot shading on the south side till the new growth is well started. The size has been 3 to 4 1/2 feet, and with proper handling there need not be a loss to exceed ten per cent. A large Engelmann growing at an altitude of 9000 feet which measured eight and a half feet was brought down two years ago and is doing well. The Pines, ponderosa, flexilis, aristata, and contorta, are more difficult to transplant having few fibrous roots, but by planting them in a grove of trees, with special attention a fair proportion may be made to grow. Picea pungens have made a growth the present season of 12 to 18 inches, that is, trees which have been planted here three and four years.

Omaha, Nebraska.

[The names were transposed; that is, what we formerly knew as Abies - the kinds with permanent and drooping cones, are the true Picea; and those with erect cones, breaking to pieces when mature, are really Abies. The Norway Spruce, called Abies excelsa, is really a Picea, and the Silver Fir, Picea pectinata, is really an Abies. - Ed. G. M].