Isaiah 55:13

The word for thornoccurs again only in ch. Isaiah 7:19. That for brier(s̬irpâd) is unknown. LXX. renders κόνυζα (fleabane). All that can be said is that some desert plant is meant. On fir-tree( cypress) and myrtle tree, see on ch. Isaiah 41:19.

for a name … for a sign i.e. a memorial to His praise. The meaning appears to be that the marvellous vegetation so often alluded to as springing up in the desert as the procession of the redeemed passes through, shall remain throughout the future ages as a monument to Jehovah. It shews at least (Dillmann, etc.) that the conception is not to be regarded as a mere poetical figure.