Just chiming in to this 7 year old thread to say that I bought a plant called "Oxalis Triangularis" on Etsy last month that fits exactly this description. It came in purple and green varieties. I was curious if the red/purple undersides were a sign of stress or just part of the plant, which is how I arrived here. There is very, very little information about the green version of this plant and I was so happy to learn more.

Josh, I've been growing oxalis crassipes (pink flowers, gray-green foliage) around my roses for years. I use them to edge several beds, and I've never had them get out of control. If they start to creep too close to the roses (I have mulch directly under the roses), I just dig some for the next person who asks for a start. I also grow oxalis triangularis (lavender flowers, very dark purple/black foliage) which some people grow in pots. It does perfectly well here in the ground. I have it in only one bed where I have other bulbs planted that grow up through during the various seasons. This oxalis has never jumped the edging. It's far less vigorous than oxalis crassipes. Once upon a time I grew oxalis regnellii (white flowers, gray-green foliage). It was the least vigorous of the three. I'm not sure I even have any left. All of the ones I mentioned were about 5-7 inches tall and grew into a solid groundcover. I believe I bought my oxalis at a favorite nursery in Cedar Hill (that has since closed - they had lovely old roses), but I have also seen oxalis in many, many places in the Metroples - even the big box stores. Sometimes it is located with the shade plants so you might look there. The only drawback to oxalis crassipes is that it browns and disappears when the temps are in the 90s - if - the bed is in full sun. It stays vigorous in my partially shaded beds, and of course thrives with plenty of moisture. The oxalis triangularis is in a partially shaded bed so I don't know if it disappears in the very hot sun. This trait of disappearing doesn't bother me; usually I have enough other things growing that no one notices that the oxalis is not there. But everyone does notice when it is there. Hope this helps some. If you like the look, I recommend it for North Central Texas. Lou

Mark G, Thank you so much for your lovely photograhs and identification of the "Oxalis Ione Hecker, a hybrid of O. enneaphylla and O. laciniata bred by E.B Anderson, I think." The information on your 'hobby site' is all extremely helpful and I, for one, would like commend you on a excellent and informative site. I found this plant at a local nursery in the Native Plant section in Tennessee, USA. It was marked only 'oxalis'. It was markedly different than the common oxalis that we have, I had to try it out. Thankfully, there was only one plant that had a bloom on it but it was was most helpful in identifying the specific plant. Now, when it disapears, I won't worry over much. Thank you, Pat

Hi, Anytime after the bulbs go dormant is good. So yes, you can dig them up now. I'm not sure how long you can keep them after digging up. I would suppose it would be at least a few months if not a half year. Do keep them in a cool dark spot so they stay dormant. Remy