We learn from an exchange that "in France, for several years past, the Tomato plant has been subject to a disease which ruins in a week the most promising planting. One writer insists that it is owing to the long continued wet weather, but the editor of the Revue Horticole does not accept this as the sole cause. The plants which were the most protected by wall seem to be the first to die, while those in open spaces are less affected. This tomato disease, so far as we are aware, has not made its appearance in the United States." But we have seen what we suppose to be the same disease in the tomatoes for some years past. So far as one might judge from the effects it is the same or very closely allied to the verbena rust, and is possibly some form of Perenospora.