The Deodar Cedar is the most popular of all the new evergreens yet proved in this country. It deserves its popularity. It is at once the most hardy, the most beautiful, and the most rapid growing of them all.

The largest trees of the Deodara that we have in any of our nurseries, are in Mr. Han-cook's grounds, near Burlington, N. J. This cultivator has perhaps 400 trees from four to five feet high. The soil in which they stand is a sandy loam. They were imported from France two years ago, and are now growing in the open nursery rows. The vigor and beauty of these trees is surprising. Some of them have made shoots nearly three feet long the present season. They all begin to assume that drooping, elegant habit, which makes this the most graceful of evergreen trees. And, as they grow older, the silvery tone of the foliage is also more conspicuous. Everybody is planting Deodars, and all the nurserymen are busy, importing and propagating them. Messrs. Parsons have, we understand, a stock for about four thousand young plants, one year established. Every large nursery in the country now advertise it, and the Deodar or Sacred Cedar of India, will in a few years we hope, be found in every ornamental plantation in the country.

We are glad to notice the Hemlock attracting more attention. It is the finest evergreen tree indigenous to North America - for ornamental purposes. A great many persons, who only know the Hemlock in the woods, affect a contempt for it as an ornamental tree. They think it "scraggy, ugly, and wild-looking." They only show their ignorance. Have they ever seen a Hemlock planted in the midst of a piece of smooth lawn - the soil a deep loam and the site favorable? No. Then they have yet to discover how full of symmetry, how finely proportioned, how graceful, how rich and dark a green in winter, how pure and soft a green in spring is the Hemlock. In faot it is as handsome as the Deodar - and is very much like it. The latter droops more and is silvery in its foliage, instead of bronzy, - but they are much alike otherwise, and are the best possible companions in the pleasure grounds.

A third tree that is worthy of high praise is one that comes to us from the mountains near Monterey - the evergreen Cypress. ( Taxodium sempervirens.) But it is only fit fop ornamental grounds south of Philadelphia. At Baltimore, Washington, and all south and west of that, it will be a great acquisition. North of Philadelphia - except in very fa-Tored spots, it is injured by the winters. In the south of France, at Angers - the climate of which is about as mild as that of Norfolk, it succeeds admirably. From a paper on this tree by our correspondent there, M. Desportes, we translate the following account of the habits of the tree.

The evergreen Cypress is undoubtedly one of the most gigantic of coniferous trees, attaining the height of 300 feet. The wood of this Taxodium is invaluable for timber - and is called by the settlers in that part of California where it grows - Red-wood - or bastard Cedar. Even in the midst of these thick forests, it attains a height of 180 feet. The trunk has a circumference of from 15 feet to 21 feet; it grows in the forests as straight as an arrow, and is naked of branches to the height of 60 or 70 feet. One of these trees has been measured, which was 51 feet in circumference at six feet above the ground! The bark is very thick, the wood is of a beautiful red color, (like that used in making lead pencils;) the grain is fine, the texture light, but breaks easily. It has the property even if used unseasoned, of not warping and not being attacked by insects. All its qualities render it extremely proper for both exterior and interior work. It is, consequently, an important article of exportation, and a great quantity of the wood is annually sent to Santa Cruz for that purpose.

Besides this account of its indigenous character, M. Desportks adds that is not only perfectly hardy at Angers, bat that it is much the most rapid growing hardy evergreen (coniferous) tree yet known. A specimen planted in M. Lerot's nursery, in 1845, in five years has attained a height of 21 feet. The diameter of the trunk near the ground is 20 inches. Another tree is 25 feet high, in a lighter soil. The branches covered with rich dark green foliage fall in rich festoons to the earth, and produce the most picturesque effect. Besides being one of the most ornamental of evergreens, the evergreen Cypress, continues M. Desportes, is one of the easiest of reproduction. Although but lately introduced into France, the nurseries are already well stocked with them. Some specimens that have been planted in the park show that it is destined to be a tree in great demand.

This tree is so hardy at Angers that M. Desportes commends it seriously to those who plant timber for profit. We can only urge our readers south of Philadelphia to lose no time in planting it in their garden scenery.