Razor vine

Razor vines are fauna native to the slime swamps of the planet Hydrus Four. They are sharp enough to scratch even a Dinobot's metal hide.

Fiction

Another Time & Place

Wading through the slime swamps of Hydrus Four in search of the cure for Nucleon, Grimlock listed getting scratched by razor vines as being among the planet's less endearing features. Another Time & Place