Answer: Oxalis is a bulb-type plant with numerous species and varieties. Many have a "shamrock" shaped leaf, and they flower in many colors, including white, pink, purple and yellow. When they flower depends on the species. They take full sun or partial shade and prefer well-drained soil with consistent moisture. They're often grown as foliage houseplants.
I found a description of a Oxalis regnellii var. triangularis that has "rich burgundy triangular leaves and soft pink flowers" in the Brent and Becky's Bulbs Catalogue, (www.brentandbeckysbulbs.com) which sounds similar to what you're looking for. I hope this info helps.
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