The twenty-eighth annual exhibition was held on the 16th, 17th, and 18th of September. The city placed one of the public squares at the Society's disposal; over this square the Society erected an immense tent made for the occasion, and made the arrangements for a brilliant display with a profuse liberality.

Since the Society commenced offering premiums for collections of plants as well as fruits and vegetables, now three years ago, the attractions of the exhibitions have annually increased. "Bare-legged" plants are rarities, and, in their place, well cultivated specimens of the choicer kinds show to greater advantage.

The premium of $20, for the best twenty plants, was awarded to Mr. Pollock, gr. to James Dundas, Esq. Various kinds of Allamandas were conspicuous in this collection, and are very useful summer blooming plants. The only striking novelty in this collection was the Fhilodendron pertuosum - a plant of the Arum family, with large, leathery leaves, having at the ends of their lobes the same sham-off appearance those of the Tulip-tree possess. In Mr. Robertson's collection, Begonia xanthina, with numerous yellow blossoms, was an object of great attraction.

An interesting feature of the exhibition was the variegated plants, several collections being shown. The variegated Hydrangea was, perhaps, the most conspicuous. In Mr. Buist's collection, we particularly noticed a very handsome Draosma? D. Nobilis, with beautiful veined foliage.

A collection of sixty-five species of coniferous plants in pots, from Mr. Sherwood, afforded a chance to many of becoming acquainted with rare kinds; and a bouquet design by Mr, Raabe, of 150 species of grasses, all very neatly named, showed how beautifully so dry a subject as abstract botany can be combined with art by a penon of fine taste.

A display of Monthly Carnations, now getting deservedly popular, as their cultivation becomes understood, was shown, in fine order, by Mr. James Thomas, from Mr. Withams.

Perpetual blooming plants should be freely encouraged, and, in this connection, two roses, by Mr. Pentland, of Baltimore, were much admired. One, Beauty of Green Mount, a noisette, with the rich crimson of Souvenir d'Ansehne, with more numerously clustered flowers. The other, with the pure white of Aimee Vibert, on the vigorous growth of a Jaune des Pros, also a Noisette, and named Woodland Margaret. Of the numerous collections of roses, a rather new American seedling, Isabella Gray, was the chief attraction. It is the yellowest and sweetest of the Sweet Yellow Tea or Noisette Roses.

There were several new competitors on the Dahlia list~Gtund Duke, lilac; Sir F. Bathurst, plum; Summit of Perfection,-maroon; Beauty of the Grove, bronze, with purple tip; 'Ring-Leader, plum; Napalese Chief, crimson, tipped'with pink; and Mrs. Wentworth, liliac, we noted as about the best.

Of the miscellaneous plants, there was little new. Weigeia amabilis, valuable as a continual bloomer, Phlox criterion, a striped variety of Phlox Drammondii, and Lantana lutea superba, with yellow flowers, were most attractive.

The fruit department was well represented. Fine contributions, coming from Boston, Lancaster, Moorestown, and! other distant places. Mr. Lasenby's Black Hamburg Grapes, the bunches weighing nine pounds and over, were better colored than usual.

Most of the new grapes were on exhibition. The Concerd (we understood, raised under glass) were about half the size of Isabellas hanging beside them, and; we were informed, scarcely equal to them in flavor. It is said to be valuable in the North, by being earlier than that kind.

The competition for the vegetable prizes was particularly brisk, room being with difficulty provided. It is gratifying to find, by the increased number of competitors, and the superior qualities of the productions exhibited, that gardeners and their employers are alive to their interests, in supporting the Society; the one by the honor, if not the profit, scorning to them; the other by the increased stimulus given to the gardener to aim at excellence in all things.

The London Horticultural Society's Gardens, which were about to be sold to meet the debts of the Society, are to be preserved, and the debts provided for by donations, new fellows, reduced expenditures, resignation of officials, and a contract to keep the gardens up for 1,200 per annum. All lovers of horticulture will rejoice to hear this.

The Scientific Convention, at Albany, has done itself great credit at its late meeting, and in the opinion of our leaders, did nothing of more general interest than to recommend the government to take measures to protect the great California trees. This, we trust, will be done; they are not numerous, and are unique. Late reports from Europe are discouraging as to their healthy growth abroad - another inducement to protect what we have.