Sawgrass

The distinctive plant species dubbed sawgrass appears in many varieties on the planet nexus. It is named for the sharp, serrated edges of the grass blades, which can easily cut through the skin of a careless human.

Sawgrass Defenses
Readings confirm the serrated edges of all sawgrass specimens contain metallic elements absorbed from the soil. This is almost certainly proof that the sawgrass vascular system can filter certain metals from the soil to create a grass blade that repels creatures that might wish to eat it - an effective defense mechanism.