'Shrubs' in the Bible

{I had a vision in the night}, and look, a man riding on a red horse. And he [was] standing between the myrtle shrubs that [were] in the ravine, and behind him [were] red, reddish-brown, and white horses.

And the man standing between the myrtle shrubs answered and said, "These [are] those whom Yahweh has sent to patrol [the] earth."

And they answered the angel of Yahweh who was standing between the myrtle shrubs, and they said, "We have patrolled the earth, and look, all the earth {is dwelling in peace}."