Senecio viscosus. This species, endemic to the European continent, was registered for the first time in the vicinity of the Observatory “Roque de los Muchachos” (ORM) by Arnoldo Santos, a local botanist. Although the first specimens were only found recently, and despite the adverse climatic conditions in that area, the species has been able to survive and proliferate. Thanks to an agreement with the managing entity of the site (Canary Islands Astrophysics Institute), the brigade at the service of the Biosphere Reserve of La Palma has been working there since the end of 2020 removing a total of 45 kg of plants to date.