The Fifty-eighth Annual Exhibition will be held on the 27th, 28th, 29th and 30th of September. The premium list amounts to $700. The chrysanthemum show will follow on the 8th, 9th, 10th and nth of November. $800 will be awarded in prizes by the Society, and $500 more by friends of the Society. Schedules may be had of Edwin Lonsdale, Secretary, Horticultural Hall, Philadelphia.

The Bulb Show of this Society, which was held on the 15th of March in the Committee rooms of the Society's Hall on Broad street, resulted in some magnificent exhibits by a few amateurs and florists. The General Union of Holland, under the patronage of the King of the Netherlands, offered gold, silver gilt, and silver medals, for Hyacinths, Tulips, and Polyanthus Narcissus. The Hyacinths were to be 50, of not less than 25 varieties; single Tulips, 25 pots of 25 sorts; Polyanthus Narcissus, 20 pots of 10 sorts.

The Horticultural Society offered premiums for smaller lots of 12 and 6, for Lilies, Azaleas, Lily of the Valley, and cut specimens, 6 each, of 11 kinds of roses in popular use for cut-flowers by dealers.

The competition was weak, but the plants of Hyacinths and flowers of cut roses, were extremely fine. The competition was, however, livelier than last year, and the great interest shown by the public in the beautiful display will encourage the Society to push on to greater efforts in the future. The gold medal was carried off by Mr. John Shaw, gardener to Clarence H. Clark, Esq. These were very beautiful plants. The bulbs showed no disposition to sprout and make offsets, the leaves were broad and stiff, recurving only at the edges, and pushing out straight from the centre of the bulb. The flowers were on stout stalks, mostly self-supporting, and the heads of flowers were carried up well above the foliage.

The flowers were all dense on the spike, and mostly of an uniform cylindrical outline of from 7 or 8 inches long by 3 inches in diameter. It was really a first class prize set. The silver gilt medal was awarded to Mr. Eisele, florist, and the silver to Mr. John M. Hughes, gardener to George W. Childs, Esq., both excellent collections, but defective in some plants in those properties noted as excellencies in the gold medal set.

It is remarkable that the smaller collections which usually contain finer specimens of culture, as having more competitors from a wider circle, were not on this occasion equal to the gold medal set. Indeed many of the small collections were contributed by the same parties who had already entered for the larger ones, and of course their best plants went where the heaviest honors were likely to fall. Craig Brothers ought to have had a special premium for their instructive labeling. The names were on small white cards across the top of slender stakes, so that anyone could read them a long distance away. The others were on ordinary small labels and behind the plants where even persevering explorations by blind hand among the leaves and pots failed to expose them.

Mr. John M. Hughes, was the only competitor for the silver gilt medal, offered for 25 early single Tulips. There were about five or six bulbs in 6-inch pots, on an average 8 inches high, and held the flowers up well above the leaves, mostly without artificial support. An interesting fact not noticed before by the reporter of the Gardeners' Monthly, was, that one variety, Rembrandt, did not close, as other Tulips do with the slightest shade, but had the petals wholly horizontal. The flower was rotate instead of cup-shaped, as in most Tulips. The upper portion of the petals are deep scarlet, while the base of the petals have large orange spots.

Mr. Hughes also earned the silver gilt medal for 20 Polyanthus Narcissus. The plants were however not wholly of this class. The collection was made up of the Poet's Narciss, Rush Daffodils and others besides the Polyanthus.

Among the miscellaneous bulbs, some Lache-nalias from Mr. John M. Hughes, gardener to Geo. W. Childs, Esq., were very much admired. L. quadricolor, besides its dwarf spikes and pretty flowers, has spotted leaves like our wild dog's tooth violet, but the great attraction was a hanging basket of galvanized wire, about 18 inches across, from which the plants pushed in every direction. There were over 50 spikes of flowers from the plants.

Mr. Hughes also had a nice collection of Chinese Primroses. There were doubles and singles among them, and many shades between white and deep crimson. The plants were in four-inch pots, and had an average of six leaves, and seventy-five expanded flowers on each plant.

Only three single plants of azaleas were in competition. The first premium was given to the plant exhibited by Pennock Bros. It was the dark red known as King of Holland. It was on a single stem, with a head about 2 1/2 feet over, and had about 400 expanded flowers on it.

H. A. Dreer made a small exhibit, consisting of two small plants of Odontoglossum, one Oncidium, one Dendrobium white, and a great number of the rarer Cypripediums, which were particularly attractive.

The roses attracted many admirers. Possibly Papa Gontier drew most worshippers. The first impression is that they are huge Bon Silene, but the latter is of course a Tea Rose. These came from Mr. John Henderson. American Beauty in several collections was scarcely less charming, its great size and bright color being superlative among the popular sorts. Lonsdale & Burton's flowers of this measured six inches across. They also had first premium for 6 Mermets, which flowers, though from a nearly globular rose, had petals nearly 3 inches long. Some Bride's, from Mr. John May, had its rosy tinted lemon-white flowers with petals about 2 1/2 inches long. The Puritan, a pure white hybrid from Mr. Evans, was not much inferior to American Beauty in size, and was very much admired. The Bennett's, also from Mr. Evans, showed what it could do in good hands. The petals were about 3 1/2 inches long, and quite equal to General Jacqueminot in the dazzling tint to the purple, like bloom on a plum, which gives such an unique character to that good old rose. The Niphetos buds of Messrs. Craig, old as the variety is, can scarcely be beaten by any of its class. These were nearly 3 inches long.