From an unused root meaning to cover; a bough (as covering the tree) -- branch.
H6073. ophe
עפאים Kt, עֳפָיִם Qr noun [masculine] plural foliage (compare Ges§ 93z; Aramaic loan-word, עָפְיָא ᵑ7 foliage, Syriac flower, branch); — Psalm 104:12.
עפא (√ of following; עֲפָא ᵑ7 Pa., Syriac Pa., enwrap, עֳפִי foliage, flower, etc., Biblical Hebrew עֳפָיִם עפאים, as loan-word; compare perhaps Assyrian upû, cloud (-mass)).