Rolling pasture lands curved upward on either side of us, and old gabled houses peeped out from amid the thick green foliage, but behind the peaceful and sunlit country-side there rose ever, dark against the evening sky, the long, gloomy curve of the moor, broken by the jagged and sinister hills.
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.