The mechanics of explosive dispersal and self-burial in the seeds of the filaree, Erodium cicutarium (Geraniaceae).

Abstract in brief

• The filaree Erodium cicutarium has a unique seed dispersal system where it can fling seeds up to half a meter away and even bury them by drilling into the ground, thanks to twisting awns that respond to humidity changes.
• Researchers used high-speed videos to study how these awns coil and release energy, developing a mechanical model to compare the energy stored in the awn with the energy used to launch the seed.
• The model helps explain the balance between how far seeds are dispersed and how reliable the dispersal method is, which can shed light on the plant's invasive potential and evolutionary strategies among similar species.]