Last winter, we noticed this shrubby plant growing between two stepping stones in a bed by the street. It was about five feet high, with five or six stems, and a glance at the leaves made me think it might have sprouted from an apple core tossed by a strolling neighbor. It held its leaves long after other shrubs were bare. This fall some of its stems are perhaps eight feet long, and it seems to have plans for forming a one-plant thicket. I have made a more serious attempt to ID it and I keep coming back to buckthorn, Rhamnus. It doesnâ€™t fit any of the species descriptions perfectly, however, or match well with photos of local species. It has naked buds, no thorns, and speckled bark on the twigs. The white undersides of the leaves contrast sharply with the glossy green tops. Some of the twigs are oddly angled back from the branches. Any ideas?