Oxalis ambigua flower

The flower of Oxalis ambigua is white with a creamy yellow, widely funnel-shaped tube, or bright yellow overall. The five petals are shallowly round-tipped to flat-tipped. The angular, pale yellow anthers grow on short filaments, not reaching the corolla mouth. Flowering happens in winter, the photo taken in August.

Some leaflets in picture have red, hairy margins (Le Roux, et al, 2005; iNaturalist).