The first time we saw flowers of this beautiful new climbing plant (about a year ago) we thought that it was a white-flowered variety of the favorite old Ipomaea Horsfalliae, as it so nearly resembles it. It has, however, been proved to be a distinct new species, and Dr. Masters has named it in compliment to Mr. Thomson of Edinburgh. It differs from I. Horsfalliae in having the leaflets in sets of threes instead of fives, and, moreover, they are quite entire. The flowers, too, are quite double the size of those of Horsfalliae, but are produced in clusters in much the same way; they are snow-white. This Ipomaea is indeed a welcome addition to the list of stove-climbing plants, and will undoubtedly become as popular as I. Horsfalliae, which may be found in almost every stove. It is of easy culture and of rapid growth, and it is to be hoped that it is as continuous in flowering as Horsfalliae. It is among the new plants of the year now being distributed by Mr. B.S. Williams, of the Victoria Nurseries, Upper Holloway.--The Garden.

A NEW STOVE CLIMBER. IPOMaeA THOMSONIANA.