pterocarya

from The Century Dictionary.

• noun A genus of three or four species of ornamental deciduous trees of the family Juglandaceæ. They have large, alternate, odd-pinnate leaves, and small, greenish, monœcious flowers in pendulous catkins appearing with the leaves. They are trees of rapid growth and bear in summer and fall long drooping racemes of light-green fruits. Three species are known in cultivation, P. fraxinifolia, a native of Transcaucasia, P. stenoptera of China, and P. rhoifolia of Japan, an important forest tree.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun Asiatic nut trees: wing nuts