P. albicasl s. White-barked Pine. Rocky Monntaine. This species, although closely related to the preceding, is believed to be different. It grows only at extreme alti tudes. It growe ou the Cascade mountains of Oregon, on alpine peaks in the Sierra Nevada mountains, and on high monutains in Idaho and Montana. The name is suggee ted by the color of the bark of the tree, which Dr. Engel mann asp ie se white as milk.
P. Lambertiana. Sugar Pine. Sierra Nevada Moun taine. Found sparsely grovving on the Sierras of Cali fornia, through their extent, at altitudee of from 4,000 to 10,000 feet. It is often 150 to 220feet high, with a diameter of eight to fourteen feet. It is highly pnzed and eagerly sought hy lumbermen for all articlee of minding lumber, and-is fast being exhausted. It is called Sugar Pine from the meet reein which exndee from partially-burned treat. It is also called Mammoth Pine and Shake Pine. It has enormous cones.
P. monticoia. Soft Pine; Little Sugar Pine. California. Grown sparsely on the high Sierras, at altitudee of 7,000 to 11,000 feet. It sonietimee attains a height of 150 to 200 feet, vvith a dianieter of five to seven feet. It reeemblee the Sngar Piue, lint with whitish, much furrowed bark, and mailer cones. The timber ie similar to that of White Pine, but ie seldom used, because the treee are so inac -cessible.
P. strobus. White. Pine; Weymouth Pine. Eastern United States. An old, well-known, and useful tree, oxtending from Canada to Virginia, but plentiful in New Eogland,-New York, and Pennsylvania. It is a large tree, bec tming 100 to 150 feet high. It is the source of much of the lumber hronght from the Northern States. It is not only very valuable on account of its wood, hut is one of the finest ornamental conifers.
P. Chihuahua. Southern Arizona and Northern Mexico.
Abies alto. White Sprnce. New England and Alle gbany Mountains. A small tree, native of the northern portion of the United States and Canada, extending north ward to the extreme confinee of vegetation. It grown from twenty to thirty feet high, according to soil and latitude. It is frequent in cultivation, and is considered a handsome tr,e.
A. nigra. Black Spruce. New England and Alle ghany Mouotains. This tree has inuch the eame range as the preceding, occasionally being found farther south on the Alleghenies. In favorable eituations, it forme quite a
large tree, about eeventy-five feet high, tall and straight. The wood la light, elastic, and strong, and valuable for many purposes.
A. Canadensis. Hemlock. New England to Wieconein. A well known tree of the Northern States, extending northwarci to Hudson's Bay, and southward along the mountains to North Carolina. It is one of the moet graceful ol spruces, vvith a light and spreading epray, frequently branching almoet to the ground. The wood lit coarse-grained, bet is need in great quantities for rough work. The bark is very exteneively employed in tanning.
A. Mertensiana. Wedeln Hemlock. California and Oregon. Thin tree closely resemblee the A. Canadensis. It grows from 100 to 150 feet high, and forme a roundish, conical head. The timber le said to be aoft and white and difficult to split.
A. Williamsonii. Williamson's Spmce. California and Oregon. Grown on the Sierras of California and on the Cascade mountains of Oregon, on high peaks of 8,000 to 12,000 feet altitude. A very gracefnl tree, attaining a height of 150 feet. The wood ie of emellent quality, but is too rare aud inaccessible to be much known.
A. Douglasii. Douglas's Spruce. Rocky Mountains Thin apecies growa through the Rocky mountain region from Colorado to Nootka Bound. On the Pacific coast it aometimea attaine the immense size of 200 to 300 feet in height, and a diameter of trenk of eight to fifteen feet. Its timber composee the great lumber wealth of Oregon and Washington Territory. The wood is soft and easily worked, much prized for masts, spars, and plank for ship bnilding, and le equally valuable for other building pur poaes. A tree cut by Mr. A. J. Dufur, was aix feet four inches in diameter thirty feet from the base, and 321 feet long.
A. Douglasii, var. macrocarpa. Large-coned Spruce. Southern California. Thie vvae collected many mars ago 4.1T1 the mountains emit of San Diego, Cal.; in 1974 eeat to the Department of Agriculture by Mr. F. M. Ring, of San Bernardino. Cal.; and again collected later by Dr. Palmer at San Felipe Canon, east of San Diego. It has cones four or five Millen the eize of Douglasii, and will probably be confirmed ae a new epecies.