Hazel (Corylus avellana) is a very common plant, appearing in hedgerows, parks, woodland, and everywhere in between. It is a small tree, with multiple thin stems and branches, and round broad leaves that are pointed at the end. In spring, before the leaves appear, they produce catkins; long, drooping flower-spikes with no petals. The hazelnuts appear in August, sheathed in bracts in clusters of three or four. Beginning green and fresh, the young nuts can be eaten, though do not keep.