I frequently return to the native trees of Vancouver in my nature journal. I'm trying to get the hierarchy straight in my head. I can't remember the Latin names, either, and keep reverting to the common names. It is the common names that make it confusing though, and I know I should learn the Latin. For example, the "pines" are both a family and a genus, and Douglas-firs aren't real firs. No wonder I'm confused!