This title belongs pre-eminently to our friend, Mayor Van Vorst, of Jersey City. Not that he grows Orchids alone; for he has at this moment in bloom the best collection of Azaleas that we have ever seen under one roof, each plant a specimen; he has also a rare collection of ornamental leaved plants,beaides Camellias, Rhododendrons, (Sikkim) Epacris, Palms, Ferns, and individual plants not often seen any where; but Orchids are his forte, and of these he has an unrivalled collection in the best possible condition. "What is infinitely to his credit, he takes the pride of a true amateur in showing them. Any of our readers who wish to see these remarkable productions of nature, will be sure of a courteous reception. As often as we have seen them, we never weary of admiring their grotesque but beautiful forms. Mr. Van Vorst has recently added a number of new and rare specimens to his collection; he seeks for them as a man seeks for hidden treasure, but with much better success. Almost any man can be a Mayor, (provided he is elected,) but very few can become accomplished Orchidists. With such a collection of plants, and such a gardener as Mr. Fleming, the Mayor is warranted in considering himself a happy man; we hope he is fully so.