He heard loud, wild peals of derisive laughter crashing all about him and caught blurred glimpses of wicked, beery faces smirking far back inside the bushes and high overhead in the foliage of the trees.
There are no more uses of "foliage" in the book.
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It’s difficult to spot the birds in the foliage.
I like to rest my eyes by periodically looking up from the computer and gazing out the window at the foliage.