Spotted spurge is a summer annual. While similar to prostate spurge, there are several subtle differences in the two varieties. Spotted spurge has a more erect growth habit than prostrate spurge. They have similar leaves, which are small and oblong shaped with an irregular red to purple spot, but the leaf of spotted spurge is slightly larger than that of prostrate spurge. Both spurges will have leaves that grow opposite on the stem, but spotted spurge has fewer leaves per stem.
Spurge can tolerate compact soil conditions and is often found invading high traffic or otherwise stressed turf areas. It is generally not found in dense, healthy stands of turfgrass, so good maintenance practices constitute good prevention of spurge infestation. Where high traffic is the problem, core aerate and attempt to divert traffic where possible. Physical removal of single plants can be easily accomplished. Follow good turf management practices including disease and insect control and proper fertilization.
Source: Virginia Polytechnic Institute & State University