The General Facts
Radium weed is not classified as a noxious weed in any Australian State. It grows rapidly, self seeds easily and it is wonderfully suitable for anyone to grow in even the smallest home garden.
It's native origins are a little obscure and it may well have originated in the northern Mediterranian region but it is now so widespread throughout the world that it can be found in most gardens.
The Euphorbiaceae family covers a wide variety of plants (almost 2000) including herbs, trees and slow-growing succulents.
When the stems are cut, many members exude a milky sap (latex) which has an unpleasant taste and is toxic when ingested in significant quantities.
Such chemical properties, combined with the presence of thorns on some species are probably useful to protect the plant from grazing in the arid regions of the world where many of the family originate.
The presence of so many members of the Milkweed family, all producing the characteristic milky sap, is the first reason for caution when selecting the weed for use as a treatment.