بقشبَقْشٌ A certain kind of tree, called in Persian خُوشْ سَاىْ, (Sgh, K,) which means “ good in shade; ” [and also is applied to the box-tree;] as has been said before, voce بَقْسٌ, which may be the same: IDrd says that بَقْشٌ is a post-classical  word. (TA.)