There are over 4000 species of mushroom in Ireland and we know little about a lot of the species ad their properties. There are over 8 species know to cause halluonogenic effect in Ireland and they may have been used by our ancestors to create some hallucinogenic rock art swirls.
Japanese knotweed (Fallopia japonica), is an invasive herbaceous perennial (a plant that can live more than one year). Since it was introduced as an ornamental plant in the 19th Century from Japan, it has spread across the island of Ireland, particularly along watercourses, transport routes and waste grounds where its movement is unrestricted. Japanese knotweed can: