Bloodgrass typically grows along the edges of watering holes and streams in tall dense thickets (approximately 3-5 feet tall). Bloodgrass looks, at a distance, very much like other tall grasses, but upon closer inspection the blades are incredibly thin.
Don't inspect it too closely. And under no circumstances should you touch it.
Bloodgrass when touched by an unwary animal is known to suddenly and inexplicably coil around the unsuspecting creature, as the animal struggles to get free the thin wire like blades of grass cut into the flesh... bleeding profusely the animal begins to struggle and is further ensnared as it touches more blades.
Should you stumble into a patch of bloodgrass, Don't Move. The grass's spring like coil won't be sufficient to cut you badly. Your only hope is to Remain Calm and Wait For Assistance
Bloodgrass is thought to have initially developed its bloody trap as a defense from herbivores, but the adaptation thrived as the plants that used this trick were substantially better fertilized.
This is more or less a reality check question, is this plant believable?
How could the grass quickly go from a long, straight, thin blade to a fairly tight coil and then return to its original straight form after killing?