A sprinting thistle is a type of plant that has the ability to to move and run. They are covered in sharp, spiny leaves and can be a nuisance to fairies, especially in large numbers. In Tinker Bell, Vidia suggested that Tinker Bell try to corral the sprinting thistles in order to be accepted as a garden fairy, knowing that it would backfire horribly. They apparently have the same movement as the tiny seed bulbs that Rosetta plants into the ground.The Sprinting Thistles are the secondary antagonists.
In a page of Iris's journal it says this about the thistles:
"One of the healthiest, heartiest plants in Never Land, this thistle can extract itself from the ground and run about on its roots. This is a great advantage for the thistle, which can take itself to water or sunlight. It can also outrun predators. No fairy has ever succeeded in domesticating a sprinting thistle."