shittah - rather, the “acacia,” or Egyptian thorn, from which the gum Arabic is obtained [Lowth].
oil tree - the olive.
fir tree - rather, the “cypress”: grateful by its shade.
pine - Gesenius translates, “the holm.”
box tree - not the shrub used for bordering flower beds, but [Gesenius] a kind of cedar, remarkable for the smallness of its cones, and the upward direction of its branches.