Charles Ellicott Commentary Hosea 4:13

"They sacrifice upon the tops of the mountains, and burn incense upon the hills, under oaks and poplars and terebinths, because the shadow thereof is good: therefore your daughters play the harlot, and your brides commit adultery." — Hosea 4:13 (ASV)

The tops of the hills were continually chosen for idolatrous temples, that is, “high places.”

Poplar — that is, the white poplar, not the storax of the Septuagint, which is a shrub only a few feet high.

Elms should be “terebinth tree” (’çlah).