"A subscriber to the Gardeners' Monthly" writes: "The foliage of my Hybrid Perpetual roses has been very much injured by a rust, which you will see on the underside of the leaf enclosed. They have blossomed well, but dropped their leaves early. I have thought the difficulty might be owing to a very dry summer. Can you suggest a remedy for the trouble, should it appear next year".

[This is a distinct species of fungus from that which produces rust on the blackberry and other plants, and is known to botanists as Phragmidium mucronutum. It is not likely that it will appear so badly, if at all, next year, as, like all the fungus family, it requires a nice combination of conditions for them to appear. This season being favorable, it is not likely the next will be favorable also. A wash of soap suds and sulphur has been found useful in preventing its spread when it begins to appear.

This form is by no means common, and if you would send a good quantity for herbarium specimens this year; or next, if too late for this, to Mr. J. B. Ellis, Newfield, New Jersey, with your full address, he would be very much obliged for them. - Ed. G. M].