Hello, I have two clones of what I think must be the same Oxalis. One I bought as O. triangularis (red leaves) and one as Oxalis papilionaceae (green leaves.) I have in years past also bought the red one as O. vulcanicola. I don't know what is the correct name. There are photos on the Wiki of the red form as O. triangularis. I have some in the house in pots and one outside under a patio cover next to the hose bib. The one outside has survived the best, probably because I have never forgotten to water it. The plant isn't easy for me here in Phoenix. I have tried at least 10 times with it, starting with rhizomes and with plants. I have noticed only about 10% of the rhizomes I have bought over the years sprout even though they look fine when they arrive. The plant is prone to die if I repot it while in growth. At first I would stop watering to let the plant go dormant in the fall, but when I did this they always died and never returned. In fact, even when they have wilted severely, they have never come back. Where in Brazil does this originate? What kind of habitat? Is it normally a summer or winter grower? Is it particularly heat-intolerant? I know most people think it's easy to grow and I'm trying to figure out why I have trouble with it. Thanks, Leo Martin Phoenix Arizona USA