While I fully agree with "Horticola" in his admiration of evergreens, as being indispensably requisite to the perfection of shrubbery plantations, I can assure him he is much mistaken in supposing that they receive but " little attention." On the contrary, it is a branch of my profession that has occupied a large share of study and experiment, with myself, at least, for a long time past. Well may you lament, Mr. Editor, over the "veto" which the climate of the Northern and some of the Midland States presents to our enjoyment of the Hollies, Laurels, and Rhododendrons of England. Although the really hardy evergreens now available either in the nurseries or in their native habitat, are very limited, yet I have managed in a pretty extensive business to make shrubbery plantations, which certainly, whatever their artistic pretensions in other respects may be, do not present the "cheerless" aspect at this season which "Horticola" so justly regrets. The artist who is familiar with his subject can, undoubtedly, with the materials at present available, create much of picturesque, or of graceful beauty even, for the winter scenery of the country residence.

The Conifers must to a great extent be relied upon for the background of shrubberies of moderate width, and for the center of those which from their situation present a double face, or which may be viewed from either side. And much care and some experience is required so to place these species of evergreens as to admit of their being ultimately thinned out without detriment to the general effect. It is not possible to do more in a short paper than to allude to this very important branch of the subject To reply to "Horticola's" inquiry so far as regards evergreen shrubs which have been found sufficiently hardy for the latitude of New York and northward, I fear, (with the exception of the Coniferae, which, strictly speaking, are trees, although used to supply the want of shrubs), the number at present to be met with is very limited. You ask, I see, if the Hollies and Rhododendrons of Europe will not succeed. I much fear that for the purpose we are now discussing, I mean for general shrubbery plantation, the Hollies will not I have seen some few specimens which have lived through a few winters near New York, but they remain so stunted and shabby that they are but miserable representatives of their noble relatives in England. I do not mean to say (and I see you name an example) that in particular situations the European Holly will not succeed ; on the contrary, I have no doubt it will But to do so, it should not be planted in the open ground until it is of size and strength to make a good strong growth the first year, (being planted immediately on the breaking up of the winter), and for the next two winters it should be slightly protected with straw (1) lightly thrown over it and fastened by strings, but not. so covered as to prevent some light and air getting to the leaves.

And beyond these precautions it should be planted in a northern aspect, but in a protected situation. (In such a situation I saw the other day a European Laurel, in Westchester county, N. Y, which has stood out near a house for three winters past without any covering).

But although the European Holly must, I fear, be always scarce here, the American I. opaea, which is very beautiful, is neglected and forgotten. Why do not nurserymen raise this from seed, which they can collect in the woods, and grow it by the thousand!

I have inquired for it at numberless nurseries without ever finding more than a stray plant or two. And I can only say, if this meets the eye of any one who has a stock for sale, I think he will find me a good customer.

Rhododendrons you are quite right in supposing may be introduced with much advantage. Mr. Saunders, I remember, in a recent number of the Horticulturist, gave some excellent advice upon planting the native varieties; and where they fail, (as I have heard some persons allege they often do), the circumstance is to be (generally) attributed to the want of a little more knowledge in the planter of the laws of vegetable physiology; some of which can not be disregarded with impunity.

The glorious Kalmia latifolia of this country, so little esteemed because so common, is in itself a host, if properly used. Perhaps with the exception of the Camellia and Rhododendron, it is not too much to say that it is the most beautiful of .flowering evergreens indigenous to the temperate zone.

With regard to the hybrid varieties of Rhododendron which have multiplied so largely in Europe of late years, there is little doubt that many of them will be found eligible for our purpose here (2); but the misfortune is that these can only be introduced very gradually; the price and the comparatively slow rate at which they can be propagated, forbidding their rapid introduction except for the purpose of experiments. With this latter view, the efforts of Messrs. Parsons & Co., the well known firm at Flushing, L. L, deserve mention, for they have succeeded in wintering in their open grounds several of the newer kinds, and a visit to them in May and June will well repay the admirer of one of the most gorgeous families of shrubs. The Himalaya varieties of the Rhododendron, which Dr. Hooker has introduced recently, are also now to be met with at some of the largest nurseries; and as some of them produce seeds freely, it will not be difficult to test their capacity to flourish here. I am not, however, sanguine as to their doing well; for although the altitude of their native habitat would indicate their enduring the rigors of this winter, it is doubtful whether the absence of the excessive moisture which is a leading characteristic of the 8ikkim country, in which they were discovered, will not be fatal to them.

This, nevertheless, is by no means a problem to be decided theoretically. Some years ago I made a series of experiments with this family of plants, that satisfied me that their powers of endurance are very great.