'Apple tree' in the Bible

As an apple tree among the trees of the forest, so [is] my beloved among the young men. In his shade {I sat down with delight}, and his fruit [was] sweet to my palate.

Who [is] this coming up from the wilderness, leaning upon her beloved? Under the apple tree I awakened you; there your mother {conceived you}; there she who was in labor gave birth to you.