Pterocarya rhoifolia - Japanese wingnut
The wingnuts belong to the walnut (Juglandaceae) family; they have showy ash-like leaves and long hanging fruit catkins, to which the winged nuts are attached. The amount of edible nut in the wingnuts is about the same as that in the seed of the Scots pine (Pinus sylvestris), i.e. not much; in this they differ completely from their cousins, such as the English walnut (Juglans regia) or the pecan (Carya illinoensis). Nevertheless the hanging decorative catkins give the tree a distinctive appearance in late summer.