I refer to this matter in the hope that it may be the means of saving some of my readers, not only from being duped and swindled, by a class of itinerant scamps that annually reap a rich harvest in disposing of impossibilities in flowers, but that I may assure them of the utter improbability of their ever seeing such wonders as these fellows offer, thereby saving them from parting with money for worthless objects, and from the ridicule of their friends who are already better advised. This subject cannot be too often brought before our amateur horticulturists. Warnings are given year after year in leading agricultural and other journals devoted to gardening, yet a new crop of dupes is always coming up who readily fall victims to the scoundrels who live upon their credulity. Not a season passes but some of these swindling dealers have the audacity to plant themselves right in the business centers of our large cities, and hundreds of our sharp business men glide smoothly into their nets. The very men who will chuckle at the misfortunes of a poor rustic when he falls into the hands of a mock auctioneer, or a pocket-book dropper, will freely pay $10 for a rose plant of which a picture has been shown them as having a blue flower; the chance of its coming blue being about equal to the chance that the watch of the mock auctioneer will be gold. It has long been known among the best observers of such matters, that in certain families of plants, particular colors prevail, and that in no single instance can we ever expect to see blue, yellow, and scarlet colors in varieties of the same species. If any one at all conversant with plants will bring any family of them to mind, it will at once be seen how undeviating is this law. In the Dahlia we have scarlet and yellow, but no approach to blue, so in the Rose, Hollyhock, etc. Again in the Verbena, Salvia, etc., we have scarlet and blue, but no yellow / If we reflect it will be seen that there is nothing out of the order of nature in this arrange- . ment. We never expect to see among our poultry with their varied but somber plumage, any assume the azure hues of our spring Blue-bird, or the dazzling tints of the Oriole; why then should we expect nature to step out of what seems her fixed laws, and give us a blue Rose, a blue Dahlia, or a yellow Verbena?