A well prepared catalogue of trees, with information such as an experienced nurseryman is capable of giving, if he inclines to embody his acquired knowledge, we always welcome. It is a task to make such an one, and we are disposed to give due credit to the maker when we find his information reliable. Such, in the main, is " A Descriptive Catalogue of Hardy Trees and Shrubs, grown and for sale by Robert Buist, Rosedale Nurseries, Darby Road, near Philadelphia." Since the breaking-up of the old Landreth Nurseries, in this neighborhood, Philadelphia has presented fewer extensive establishments where trees in large quantities could be purchased than would seem to be her proportion; but land has become so dear in our vicinity, that nurserymen have been obliged to remove to some distance, where ground was more reasonable, and they are distributed near to the neighboring towns and villages, such as Westchester, J. L. Darlington & Co.; near Norristown, Montgomery County, Pa., Alan W: Corson; Woodbury, N. J., David J. Griscom; Germantown, Thomas Meehan, William Saunders, John Bright, Messrs. Maupay, Bowman, &c; Elizabethtown, N. J., Wm. Reid; Marcus Hook, Pa., D. Fulton; near Burlington, N. J., George Deacon; Hightstown, N. J., Isaac Pullen; Falls of Schuylkill, Pa., David Ferguson. Several other establishments are growing up, and promise, ere long, to have a supply that wilt keep us by no means in the rear, in this respect.

Meantime, we shall make Mr. Buist's Catalogue the text for a few remarks.

The Evergreens are the first, and Mr. B.'s list is a highly interesting one. The following, from the Introduction, is excellent; the difficulty generally is to induce the planter, or his successor, to cut away a fine tree, to make room for better growth: -

"We must observe that nearly all planters of coniferous Evergreens make the same fatal error in planting the margins of walks, carriage-roads, and drives. Trees are generally small when procured from the nursery, and they are at once planted about three to six feet from the edge of an entrance in place of twenty feet. Where an approach is required to be belted with Pines or Spruce, the ground should be well prepared, at least twenty feet from the edge of the drive; and any quick-growing tree, such as Silver Maple, planted close to the verge, to give shade or shelter. When the Evergreens have attained the height of fifteen or twenty feet, the Maples can be dispensed with, and removed to some boundary, or destroyed. Some may think this a tedious process, but it is the best and most permanent for having an approach to a mansion worthy of a name, and it will he a permanent memento of the planter to all eyes of taste".

Nothing could be better than the above advice. We have seen recently many examples where the newly planted trees have encroached upon walks and drives, after four or five years' planting. It is difficult, we know by experience, to look upon the little trees of three or four feet height as towering monarchs, and this is , one of the points which requires the experience of a landscape-gardener, or of a man of some forethought.

Commencing on page 1, it may prove a useful service to many aboot to plant, if we insert Mr. Buist's remarks on the several species of Evergreens which he has for sale: - " Trees and Shrubs can be removed from October to April, whilst the ground is open. The roots of trees should never be exposed to the air after arrival. They should be watered and placed in the earth at once till properly planted.

The Euonymus, till last winter, was considered here so nearly hardy, as to be adopted; it occasionally lost a limb, but was, last year, entirely destroyed; still, it may be again planted, with a prospect of success; the green is much more desirable than the variegated, and is a superb shrub.

Euonymus, Evergreen Chinese Spindle-Tree

A dwarf shrub, that grows freely,in the shade or sun; makes a beautiful hedge south of Philadelphia, growing in any soil; height, eight to ten feet. In ornamental gardening, it is with us as the Holly is in England, indispensable.

"Fitz-Roya Patagonica, a new Evergreen, with drooping branches; supposed to be hardy here.

Ilex, Holly

Beautiful Evergreens, that do well in Southern latitudes, and tolerably hardy in this vicinity, when protected from the sun in winter. For diversity of character and beauty of foliage, no family surpasses it; it delights, in rich soil; many varieties, and our native Opaca not to be forgotten.

Juniperus

The Juniper is a very classical plant, being frequently mentioned by, and highly esteemed amongst the ancients. It luxuriates in every temperate country, even on the most barren soils, being an important feature in all rugged countries - growing on any soil or situation, even under the drip of trees. The plants generally attain a height of ten to twenty feet; many varieties.

Kalmia, Sheep Laurel

The broad-leaved. Sheep Laurel, or Kalmia latifolia, is common in all moist or shady woods of the Middle and Eastern States. Its beautifully white and pink crimped blossoms resting on a bed of the richest green, are truly elegant. A dwarf bush.

Laurus, Laurel Bay

Plants with very thick, coriaceous leaves, generally of a spicy fragrance; grow well in any soil, but are too tender for culture in the Middle States; height, from six to twelve feet.

Ligustrum, Prim Or Privet

Shrubs with beautiful, dark, shining green leaves: they are often sheared into various forms, and make very agreeable fancy hedges; will grow in shade or sunshine; in height, from six to twelve feet.

Libocedrus, Chiliensis

This genus is closely related to Thuja, very recently introduced from the mountains of Chili; it has a beautiful silvery soft green appearance, and will grow from ten to fifteen feet; scarce yet.

Magnolia, The Tree Laurel Of The South

Whether regarded for the richness of its foliage, the beauty of its flower, or the majestic habit of the tree, it has no superior, and is everywhere hardy south of Philadelphia and Cincinnati. It attains a height of forty to eighty feet; requires deep, rich soil.