The righteous shall flourish like a palm tree . Palm trees are easily spotted and identified. One does not need a Ph.D. in botany to identify a palm tree. Palm trees are difficult to hide. They don't blend in with their environment.
Palm trees are fruitful.
They were a major food source for the Israelites. They bear their best fruit when they are old. Palm trees have many uses. The Syrians had over 360 uses for the palm tree. The seed from its fruit was ground and fed to livestock.