Poplars

trembling poplars yellow poplars white poplars tulip poplars black poplars Mongolian poplars balsam poplars necklace poplars Lombardy poplars yellow poplar 北美鹅掌揪 white poplar n. 白杨树 trembling poplar tulip poplar [医]美国鹅掌楸 black poplar 黑杨 Mongolian poplar