Over on environmental graffiti they are lauding the seashore mallow. It is an oily plant that grows in salty land (with a fair amount of water), and would allow biofuels to be made from a crop which is not also used as a food source.
To steal a quotation:
It is according to John Gallagher of the University of Delaware, “the pig of the vegetable world, you can use everything but the squeal.”