Stolon   
Botany A shoot that bends to the ground or that grows horizontally above the ground and produces roots and shoots at the nodes.

Trifoliate
 1. having three leaflets, lobes, or foils; trefoil.

Vermifuge
 1. serving to expel worms or other animal parasites from the intestines, as a medicine

Whorl 
 1. a circular arrangement of like parts, as leaves or flowers, around a point on an axis; verticil.