These plants are perfect on slopes where it's difficult to mow. I'm presently turning my neighbor's hillside of weeds into a perennial peanut patch. With their little yellow blossoms, they brighten up the landscape - and fix nitrogen in the soil. Did I say how much I liked them? NO MOWING!!!
They don't produce a peanut that you eat, but my livestock likes one part or another of these succulent vines. The chickens and ducks eat the blossoms and the goats eat the tips. My kids and dogs romp and roll in them and, unlike grasses, it never leaves you itchy.
Besides all that, they're one of the most drought tolerant plants I have. When other plants droop and yellow after a period of no rain, the peanuts are still bright green.
Sources are: seeds from your favorite Hawaiian garden store, or cuttings from vines in your friend's yard (that'd be ME!) Contact me if you'd like to get some established in your yard. firstname.lastname@example.org