I've been checking out photos of erodiums in the NARGS gallery and on other websites. The flowers and foliage of some species are awfully pretty in a sweet sort of way. I'm loathe to try them, though, because of the invasive weediness of Erodium cicutarium.
What are others' thoughts and experience? Are some species well-behaved enough that they won't take over the western U.S.?