The hardiest of all pears, introduced from northeastern Asia. White flowers, semi-glossy foliage and dense, variably-rounded forms are of particular interest. The largest tree in North Dakota is 29 feet tall with a canopy spread of 24 feet.McDermand Ussurian pear, Pyrus ussuriensis Maxim, is a seed-propagated cultivar recommended for use in multirow farmstead and single row field windbreaks, wildlife habitat, and recreational, urban, industrial development and transportation corridor plantings. The vigorous, dense growth makes it useful for windbreaks and screen plantings. The attractive flowers and yellow-orange autumn color enhance its aesthetic value. McDermand was released in 1990 by the USDA Natural Resources Conservation Service (formerly the Soil Conservation Service) in cooperation with the State Agricultural Experiment Stations of North Dakota, South Dakota, and Minnesota.