I expect the trillium 'species, varieties, forma and cultivar list' will be debated and evolve untill the end of time. I wish not to advocate a list but provide and update an inclusive list as I find along my trillium journey and acknowledge that it continues to be a source of frustration as well as help.This is illustrated in T. cuneatum where I observe more diversity within the species than exist between some different species. I continue to remind myself ,when frustration sets in, that God created trillium and they are to be enjoyed. I invite your comments and submittal of trillium taxa information for inclusion.
Feedback and Submittals:
Please email any 'trillium taxa information' submittals to ... <firstname.lastname@example.org>
Note: Most of the varietal/forma names (especially in the pedicallate trillium) aren't accepted as valid at this point in time. I have included them since they have been helpful to me.
The North American Trilliums:
THE Asiatic Trilliums: