See Tree of life

Erodium cicutarium Aguja de pastor.

Their achenes curl upon drying (and also when I sqweezed it with my fingers, probably because humidity.). Seed launch is accomplished using a spring mechanism powered by shape changes as the fruits dry. The spiral shape of the awn can unwind during daily changes in humidity, leading to self-burial of the seeds once they are on the ground. The two tasks (springy launch and self-burial) are accomplished with the same tissue (the awn), which is hygroscopically active and warps upon wetting and also gives rise to the draggy hairs on the awn.

Pepinillos del diablo

Ecballium

The Science of Grapevines: Anatomy and Physiology