Illinois bundleflower? And Wes Jackson is also growing Maximilian sunflower
in Kansas, but that may be zone 5. Both have significant quantities of oil.
Most indigenous people in the frozen north get their oil from animals.
> I've just realized that I don't know of a single one good for zone 4 or
> colder. The closest thing to this that I do know is the seeds of most
> fruits such as apple, pear, peach and apricot have a small amount of oil
> and the seeds themselves are inedible because of the cyanide content.
> The composition of persimmon and pawpaw seeds needs to be checked on.
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