I agree with Roger that the Patagonian and Falkland rhizomatous Oxalis species don't tolerate winter wet very well. My best results with them have been in a part of the bulb frame that gets occasional summer watering, and in plunged pots under a roof kept along with my small alpines. In nature I've seen them growing in very peaty, sandy soil near the edge of high banks and seaside cliffs. One thing I know about them is that they resent disturbance and have to be left alone for several years before they make a good show. Oxalis adenophylla is an easy, permanent garden plant here in the Northwest. Mostly I have it in crevices in the rock garden. In nature it grows in scree, especially in low spots where I suppose the snow lies late, much like where one would see deciduous Lewisias in our part of the world, or Crocus sieberi in the Mediterranean. I wish we had the color variation in our garden stock that appears in nature! Many wild forms have much darker flowers. I don't know how viable Oxalis seeds remain in storage, but it would certainly be worth our while to get more of the Andean species into cultivation. Rose-pink O. squamata, which is fibrous-rooted rather than having a storage organ, was a delight in my rock garden for some years but failed to return after one cold winter. It seeds readily and probably shouldn't be turned loose in a very warm garden. There is one called, I think, O. compacta, that is very tiny and fuzzy, at high elevations. And there are a number of attractive very small species in Chile's northern coastal desert areas, with rather succulent leaves. Jane McGary Northwestern Oregon, USA