A Mammoth Rose bush, the largest we think in the United States, adorns the cottage of one of our correspondents, Mr. S. A. Rendall, Santa Rosa, Cal.

From the description forwarded to us, we take the following facts: It was planted in 1858, and is of the Lamarque variety, well known as one of the most beautiful of the white colored sorts. It has grown during the past 15 years from a small slender bush, with astonishing vigor, just as all roses do in the wonderful air and sunshine of the Pacific coast, until it has clambered over the window and covered the very roof to the summit. Imagine a huge garland, or rather mountain of roses, 25 feet in height - 22 feet across, splendidly developed, blossoming over a surface of 400 square feet, and having upon it at one time no less than 4,000 full blown roses, and 20,000 buds.

The stem near the ground, measures 24 inches in circumference; just above the ground it separates into three principal stems that grow over twelve feet to the cottage eaves, without lateral branches. These main stems pass between the eaves and a strong support attached to the house.

The engraving hardly does justice to the beauty of the rose, as compared with the photograph we received. As one of the most charming curiosities of floral growth, it seems to us a wonderful specimen of nature's prodigality.