On the matter of meridian lines, the westernmost and southernmost Canary Island at 17°53' to 18°09'W is El Hierro or Insula Ferri (iron) in Latin and also called Isla del Meridiano, 'Meridian Isle'. When and by whom isn't clear but the dominant species of tree is, rather tellingly I'd have thought, a juniper known as Juniperus phoenicea.
The island was once considered to be the ‘ends of the earth’ and is still little visited perhaps due to the likelihood of earthquakes and/or landslides though I am assured that nowadays it is "home to state-of-the-art renewable energy schemes that happily co-exist alongside centuries-old customs and traditions."