The Canary Islands are famous for echiums. The best known are the towering E. pininiana from La Palma and the beautiful red-flowered E. wildpretii from Tenerife. But there are many others and the west side of Gran Canaria is the home of E. decaisnei (although I think it is also found on other islands). It is a perennial, shrubby echium to about 1.5m high and grows on slopes and cliffs and in recently disturbed soils beside roads at cooler elevations. The flowers are white but there is pink or blue in the throat that must tell pollinators the age of the flowers or, perhaps, if the flowers have been pollinated. Echiums are in the Boraginaceae and a feature of many of the genera is that the flowers change from pink to blue – think pulmonaria and myosotis. This is another plant that would be a good addition to frost-free gardens – oh to live in San Francisco!