I'd like for the DUmmie to post a list of those crops.
The only crop for biodiesel that I know of is soybeans.
Pretty much, the DUmmie is bootstrapping a variety of experiments into the use of arid-land plants into something that actually exists as a functioning production technology. It doesn't. Even those experiments (Had they proven economically viable) would require 'farming' to sow and harvest them, the same as any other crop. As it turns out, those experimental crops will produce fuel economically when we are about as hard up for it as Germany was in late March of 1945, and not before.