 It was once thought that the original pollinators of "Isoplexis" and the other Canarian bird pollinated plants (such as members of the genera "Canarina" and "Lotus") were sunbirds which had become extinct on the Canary Islands; this might explain why "Isoplexis" species are rare and considered endangered species (Vogel 1954; Vogel et al.1984; Valido et al.2004).