An unusual little thing that certainly doesn't look like an Oxalis. The plant has stiff "leaves" (really just petioles- the real leaves are short- lived and small, but are the typical Oxalis shape) that look a lot like Ruscus, and I think they can be used in flower arrangements as such (though I'm not a florist). The flowers are a lovely, cheerful yellow, and like other Oxalis, nearly always on the plant. The flowers are borne on the stem- it almost looks like a leafy Forsythia or a yellow balsam Impatiens from a distance. Definitely something that can satisfy both the serious collector and the person who only likes flowers.
I got this plant to add some color by my orchids when they're not in bloom, and it turned out even better than I hoped! The plant I got was tall (10 inches or so) and upright, so perfect for a windowsill. It has kinda an unusual blooming habit with flowers growing from little curls around the center stalk, and it put out buds right away. There are just shy of a dozen or so flowers that open each day, with extra blooms after more humid or sunny days. Really charming! :)
I've had this for a couple of years now, growing in a clay pot on the patio year round here in South Florida. Slow growing but constantly in bloom. So easy - just water it once or twice a week in the dry season - no extra water needed at all when it rains every day. Mine is growing in mostly bright shade but depending on the season it gets some direct sun, mostly in the winter. I suspect it would do very well in a sunny window in northern climates. And btw I've never fertilized it - well maybe a little miracle grow a couple of times a year when someone else in the household has watered it. What makes it really unusual is the fact that it doesn't resemble what I've always known as Oxalis. Not even remotely similar to the familiar "shamrock" oxalis plants - or the dreaded weedy version that pops up all over the lawn! This one is more like a miniature shrub with it's woody stems and unique, decidedly UN-shamrock or clover looking leaves.