Surah As Saffat Tafseer

The shoots of its fruit stalks are like the heads of Shayatin.

this is a description of how ugly and repulsive it is. It is likened to

رُوُوسُ الشَّيَاطِين

(the heads of Shayatin), even though they have never seen them, because it is a well-established idea in people's minds that devils are ugly in appearance.

فَإِنَّهُمْ لَاإكِلُونَ مِنْهَا فَمَالِوُونَ مِنْهَا الْبُطُونَ