System and devices for assisting in planting a growing floating macrophyte-type plant Species in uses for the purification of water The invention relates to a system a devices for assisting in planting and growing floating macrophyte-type plant species in uses for the purification of water , comprising the use of three devices preferably formed from low-density plastic materials ; a plane polygonal floating structure with elements for connecting the other floating structures, provided with at least one inner coupling bar connected to the contour of the floating structure or to another inner bar by means of a flexible arc ; a plane crossed-linked structure with element for anchoring to the floating structure and at least one central circular housing; and a basket or cone consisting of a flexible plastic material and containing a copy of a macrophyte plant a root cutting or rhizome with a troncoconical form.