'Poplars' in the Bible

"On the first day, take branches from impressive fruit trees, branches from palm trees, boughs from thick trees, and poplars from the brooks. Then you are to rejoice in the presence of the LORD your God for seven days.

The lotus trees conceal it in their shadow; the poplars by the stream conceal it.

On the poplars in her midst we hang our harps,

For this reason what they have made and stored up, they carry over the Stream of the Poplars.

They will sprout among the grasslike poplars by flowing streams.

They sacrifice upon the tops of the mountains, and burn incense upon the hills, under oaks and poplars and elms, because the shadow thereof is good: therefore your daughters shall commit whoredom, and your spouses shall commit adultery.