Living loblolly pine stumps (Pinus taeda L.) appear to be relatively uncommon, but not rare. Excavation of roots and application of a P32 solution to two living stumps showed that they were connected with living trees by means of natural root grafts formed some time before the trees reached 35 years of age. Radiophosphorus was found to move out of the stump and into the stem of a single living tree in both cases. Distribution of isotope in the crowns of these trees was not uniform 3 weeks after the materials were introduced; a larger amount of isotope occurred on the side away from the point of entrance into each stem than on the side facing the point of entrance.