'Algum trees' in the Bible

Send me also cedar-trees, fir-trees, and algum-trees, out of Lebanon; for I know that thy servants know how to cut timber in Lebanon: and, behold, my servants shall be with thy servants,

And also, servants of Huram, and servants of Solomon, who brought in gold from Ophir, have brought in algum-trees and precious stone.

And the king maketh the algum-trees staircases for the house of Jehovah, and for the house of the king, and harps and psalteries for singers; and there have been none seen like these before in the land of Judah.