This post continues the results of my quest for very small flowers noticed on my recent walk. This one is known as Low Hop Field Clover Trifolium campestre Schreb. According to Plant Profile of the USDA, it is found in most of Canada and the U.S. I notice the small yellow flowers every time we go walking.
Each small 1/4″ clover blossom shows proudly among the green leaves. The plant is a member of the pea family (Fabaceae). A key identifying feature is the larger middle leaf of the three.
If you want to read more details about this species, visit the Illinois Wildflowers site.