Poplar (Libneh)

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Populus Alba (White Poplar) Leaves
It was probably the white poplar (Populus alba) which Jacob employed: it was “green” in the sense of being fresh, moist. The poplar affords a grateful shade from the heat of the sun and was therefore one of the trees chosen under which the Israelites burnt incense (Gen. 30:3737And Jacob took him rods of green poplar, and of the hazel and chesnut tree; and pilled white strakes in them, and made the white appear which was in the rods. (Genesis 30:37); Hos. 4:1313They 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. (Hosea 4:13)). Some judge the Hebrew word libneh to refer to the “storax tree” (the styrax officinale) which also grows in Palestine.
Populus Alba (White Poplar)
The Storax Tree