Trillium angustipetalum syn. T. kurabayashii

Jane McGary
Tue, 19 Mar 2013 16:39:46 PDT
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 I see that the name T. angustipetalum has superseded T. 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?

Jane McGary
Portland, Oregon, USA

More information about the pbs mailing list