That the Mistletoe will be found on a plant abundantly in one period of the world's history, and in the same region centuries later be found chiefly on other plants, is extremely interesting in connection with the supposed change of climate with time. Our note on this topic has attracted some attention, and we should be glad to have further notes on the subject. What is wanted is to know the prevailing host plants from as many localities as possible.

We believe we are not mistaken in our impression, that in the upper waters of many Virginia rivers, for instance the Gauley, Greenbrier, Kanawha, New River, Shenandoah, Rapidan, Roanoke, and others along which the writer has collected plants, the Mistletoe was more frequently associated with the elm than any other tree. The opportunity for collecting in the lower or coast line counties has been more limited.