We have grafted many of the named varieties of hickory onto pignut stocks, using several thousand scions. We have found only one variety (the Davis shagbark) that will grow on pignut stock. We have heard of one or two others but have never tried them. Nearly all varieties grow well the first season but fail to leaf out the following spring. They appear to winterkill. Davis has continued to grow on it for over fifteen years but growth is slower than on shagbark or bitternut stocks. PIGNUT, _Carya glabra_ I have never been able to positively identify this species of pignut. Pignuts growing here vary considerably in roughness of the bark, some being smooth while others are as rough as the shagbark. In other respects they are essentially the same, all having seven leaflets per leaf. However, I have observed a very few pignut trees having smooth bark and five leaflets per leaf. The leaves are finer and smaller than on the seven leaflet trees. These may be the _glabra_ species, but if so, grafting results have been no better on these than on the seven leaflet trees. As nursery stock the pignuts are worthless. However if one has some nice young pignut trees growing where he wants them, it is feasible to graft them to Davis or some other variety which has proven its ability to grow on pignut stocks. It is not advisable to graft hickory trees growing in dense woods. MOCKERNUT, _Carya alba_ While the mockernut is also a tetraploid, it is a somewhat better stock than the pignuts, in that more of the named varieties will grow on it and as the mockernut is faster growing than the pignut, such grafts will usually grow faster. It is of little value as a nursery stock, but if one has young mockernut trees growing where hickory trees are wanted, they would be somewhat better to graft than would pignut trees. One would at least have a larger selection of varieties and the grafts would grow faster. PECAN, _Carya illinoiensis_ While we have read many favorable reports on the use of the pecan as a stock on which to graft shagbark, shellbark and hybrid hickories, our own experiences with it have not been very favorable. This may be due to the fact that we have used only two varieties of shagbark on pecan-stocks and may have happened to use two varieties that are not well adapted to pecan. Pecan seedlings are much faster growing than are shagbark seedlings and for this reason would be valuable as a nursery stock if satisfactory in other respects. BITTERNUT, _Carya cordiformis_ All of our experiences with bitternut as a stock, both in the nursery and as young trees growing in permanent locations, have been very favorable. We have heard reports of grafts failing on bitternut stocks after a few years growth. All such reports have come from regions considerably farther south than our location. It may be that the bitternut does not thrive as well in the South as it does here.