Nick Upton / Canaries endemics Mountain scabious (Pterocephalus dumetorum) and Canary island sage (Salvia canariensis) flowering below El Rana and Roque Nublo, volcanic basaltic monoliths on the Tablon Nublo plate...

Nick Upton / Canaries endemics Mountain scabious (Pterocephalus dumetorum) and Canary island sage (Salvia canariensis) flowering below El Rana and Roque Nublo, volcanic basaltic monoliths on the Tablon Nublo plate...

Melvin Grey / Edmondston's chickweed (Cerastium nigrescens) growing in rocks, Unst, Shetland, Scotland UK. June.

Melvin Grey / Edmondston's chickweed (Cerastium nigrescens) growing in rocks, Unst, Shetland, Scotland UK. June.

Nick Upton / Cloud around the highlands of Tenerife, with dense forests of Canary Island pine (Pinus canariensis) and montane endemics including Teide white broom (Spartocytisus supranubius) and Teide straw (Desco...

Dave Bevan / Rhododendron (Rhododendron sp.) flower spikes showing symptoms of Sudden Oak Death (Phytophthora kernoviae), a fungus-like pathogen.