Thanks for the heads up Ruud. Some sites note that O. flava is "highly variable" with yellow, white or pale red/violet flowers but I haven't found a recent definitive description for O. flava. This particular plant is noted by Telos as Oxalis flava Lavender Form (L. lupinifolia) which I've added to the caption. I'll move this image and the Pink Form image to the main plant entry.
