Sentence:  The road leading south along the river was shaded with old <WSD>trees</WSD> , and in the moonlight the silvery landscape was like a setting for trolls and wood gods rather than the Hudson River Valley of his boyhood memories . 
Meaning of the word marked with <WSD> tags:  a tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms