I was comparing some trilliums starting to flower in the garden under the names T. kurabayashii and T. chloropetalum, so I researched them online. I see that the name T. angustipetalum has superseded T. kurabayashii for red-flowered trilliums, and that T. chloropetalum is now apparently restricted to the whitish-flowered ones in California. Both are sessile trilliums. Around here most people grow a form of T. angustipetalum from southern Oregon, known at least for a long time as kurabayashii; it can grow very large, reaching at least 65 cm in flower, with huge leaves. I also have a plant sent me by my brother, who dug it up while planting apple trees in an orchard in Tuolumne County, California. It's considerably smaller than "kurabayashii" but is within what CalFlora defines as T. angustipetalum. Can one of our California flora experts tell me if the large Oregon population is the same as the smaller California one, or if it is considered a subspecies? Thanks, Jane McGary Portland, Oregon, USA