OF the new Poinsettia, which has made its appearance in our American greenhouses, Mr. Robert Buist thus writes the Gardener's Chronicle: " I call your attention to a new Double Poinsettia. It is a towering bunch of crescent-formed bracts, at least ten inches high, and as many wide, which will, no doubt, when in the hands of expert cultivators, be grown to eighteen inches high, and as much in diameter. Such crowns, upon well-grown plants, will surpass everything now known for table ornament, conservatory decoration, or the manipulations of the bouquet maker. On a recent tour through the grounds of Mr. Isaac Buchanan, the millionaire florist of New York, he drew me towards two plants of familiar outline, but on inspection I discovered a plant entirely new to me. " Is this the Double Poinsettia? " I asked, "It is, and I paid $1,000 In cash for it," was the reply. The saddle-like foliage has a more graceful outline than the present Poinsettia; the newer, of deeper purple; the petiole (foot stalk) has two erect stipules of about a quarter of an inch high, surmounted by two glands.