“…Alexander von Humboldt and a large group of guides and companions climbed the Teide on 21/22 June 1799, using the same road used by many visitors before and since (Figure 2), and staying overnight at 2980 m elevation (Heyd, 2015;Schaumann, 2012;Strobl, 2018;von Humboldt, 1816avon Humboldt, , 1852von Humboldt, , 1859. During their 6-day visit to the island, Humboldt and Bonpland made 16 plant collections of which six come from the Teide (Bonpland, 1799(Bonpland, -1804; Table 1).…”