It's a small plant, an annual in the States, it would be. The stems are straight and have nodes that easily sprout roots. If it's near something like a bush or chain link fence, it climbs, but has no tendrils. Can stand dry conditions.
I have heard that it's a pest in Hawaii.
But I like having some because the butterflies and bees are on it constantly. I guess it really has a lot of nectar. I put a Desert Rose right in with it, but the bees ignored the DR, boo.