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The arches over the doors were painted with black cows, white poplar trees, and owls.

Nearby, the white and green armoured personnel carriers of China’s paramilitary People’s Armed Police raced past, along a corridor of white poplars.

Trees like white poplar or gray birch generally give way to other species in a few dozen years.

The white poplar is sometimes called the silver-leaved poplar because its dark, glossy leaves are lined with cottony nap.

The European white poplar, Populus alba L., with light gray bark and leaves, white wooly beneath, is often found near old houses and along roadsides.