Sadly, I see that my work has been superseded by more modern investigation. Both parents are now regarded as belonging to the same genus. The Nootka Cypress has been moved into the genus Cupressus to join the other parent, the Monterey Cypress. There are now about forty varieties known. I worked on "Haggerston Grey" and "Castlewellan Gold." My favourite Cypress is the tall, dense, narrow Cupressus sempervirens, which gives the Mediterranean region much of its flavour. My very favourite conifer of all is the stone pine, or umbrella pine, Pinus pinea, characteristic of southern Italy around the Bay of Naples and the Sorrentine peninsula, my favourite bit of planet Earth.