During A recent visit at German town, Pa., one of our most enjoyable visits was spent at the greenhouses of Messrs. Miller & Hayes. Within the past three or five years this firm have developed a peculiar trade, erected a large number of greenhouses (13), and have become in new specialties the largest growers in America. The Rose is their favorite flower, and the enthusiastic admiration which the advent of a new and desirable Rose creates in their spirits can not half be appreciated unless the beauties are seen for themselves. However, Mr. Hayes' articles in our numbers tell capitally some of the best sorts, and give the names of the newest and most remarkable.

Prominent among them all are the two favorites, Mme. Celina Noirie, a fine showy Rose in its blossoms, and an excessively strong grower and very hardy, a capital sort for any amateur.

Madame Trifle, an excellent showy Rose of most exquisite yellow color, petals tinged with violet, with the admirable characteristic that its blossoms will hang for three weeks a steady bloom, as compared with the Saffrano, whose blossoms fade in a day. This feature is of great value.

The Miller Hayes Rose, of which we have made previous mention, as a complimentary name given by E. Verdier to his most valuable seedling of 1873, is here observed to possess remarkable vigor, and promises to be of exceeding value. Although it has not yet bloomed in America, yet the cautious description of M. Verdier leads us to expect from it points of fine merit. The flowers are large, full and fine, cup shape, thick petals, color crimson, with bright center and shaded dazzling velvety red; erect reddish shoots, short spines very vigorous in growth, a seedling of Charles Lefebvre, and pronounced Rose of the first class - was first named and introduced by Verdier, in November, 1873.

Among the numerous collection of valuable plants and seedlings, our attention is attracted to the new Coleus, Nellie Grant. This is of excellent habit, very vigorous, possessing nearly the same crimson shade as the Queen Victoria, but with broader yellow margin on the tip of the leaves. We can imagine that for large bed masses it would create a splendid display of color and a distinct contrast to the beds of the darker colored sorts. It has received the best premium at two successive meetings of the Pennsylvania Horticultural Society. It is not known where it originated. An additional characteristic of its growth (contrary to the usual habit of such plants, where the marginal colors grow less with increasing size), the yellow margin of the leaf in the Nellie Grant is found to grow broader with added age and size of the plant, while the crimson center becomes more brilliant.

Among the new Geraniums now attracting distinguished notice is the new variety, Master Christine, a splendid truss of delicate pink, and a strong grower. It seems from its character capable of sharing a permanent and worthy popularity with the old favorites of attraction, Warrior and Gen. Grant. We saw it in one of the gardens near Boston in the fall of 1873, where it seemed to be considered a success, and an admirable bedder.

The most attractive and satisfactory bedder for 1873 was the Lucius, and we can conceive nothing more dazzling than a display upon the lawn of beds of both the Lucius and Master Christine. Among the other good plants observable in the greenhouses are new varieties of the Ivy. We were especially interested in the following, which we consider worthy of general notice and commendation:

Hedera digitalis, a beautiful sort for hanging baskets, possessing peculiar striped veins and leaf ribs.

Hedera folia picta, exceedingly variegated with yellow, growing more marked with age; considered best of the variegated class.

Hedera latifolia elegans variegata, charming.

Hedera Japonica versicolor, a rapid grower, beautiful white bordering.

Hedera algeriensis, possesses a very large leaf, fully six inches in length, at first light green, then turns quite dark. It is found to be quite hardy, and we cannot imagine a more desirable sort for arbors, balconies or the lawn.

Among the other attractions are the new and remarkable show of Pansies, mottled shades, just imported from Europe; also the Carnation, of which there is one new sort, Glorie de Venus; the new collection of Aloes of nearly twenty varieties; a fine plant of the Araucaria excelsa Imbricata.

Among the hanging baskets,which were nu-merous,we observed what an excellent addition was Enonymus variegata, its peculiar yellow and green foliage showing to great advantage.

The Echeverias were grown quite largely, and public taste is now demanding them in such quantities that they are becoming an article of considerable sale.

Observing a group of the Cyclamen Per-sicum. we are pleased to observe some with flowers of pure white and remarkable size with but small pink eyes. This has been named the Grandifiora.

Considering the rapidity which has characterized the erection of these greenhouses, and the excellent management and large quantity of stock, all developed within three years, it is a matter of congratulation that the public have such taste as to lead to the successful patronage of so good a floral resort.