The only flower was approximately 10mm diameter. The plant was growing prostrate in the middle of the path, did not see any other similar plants nearby.
There are several species of creeping Oxalis in the CNM area. If you wish Oxalis to be identified to species level, please provide good closeups of the stems showing the hairs clearly, and of the bases of the leaves showing the outgrowths at the base (stipules), or the lack of stipules.