Iâ€™m still not quite sure what these leaves are, but i think they might be in the viburnum family. Whatever they are, a handful yielded up this strong warm yellow on both silk and cotton, a very pleasant surprise. All i did was throw them in a jar and after they soaked for 3 days, add a sprinkle of alum. You can see they have distinct saw edges on the leaf itself and along the petiole, and a narrow curving tipâ€“any help to anyone to identify them?? The shrub also had dark red berries, not clumped but as a cherry bunch would grow, all coming from one point and on their own petioles. The yellow is actually much darker and stronger on the silk fabric and the cotton thread, but i wanted the leaves in good light for ID purposes.