This weed is common lespedeza. To learn about is biology and control, see this publication by Patrick McCullough, UGA Extension Weed Specialist. This information is taken from his publication.
Common lespedeza (Kummerowia striata (Thunb.) Schind syn. Lespedeza striata) is a freely-branched summer annual legume that is a problem weed in lawns and other turf areas. Common lespedeza, also known as Japanese clover or annual lespedeza, has three smooth, oblong leaflets with parallel veins that are nearly perpendicular to the midvein
As common lespedeza matures, the stems harden and become woody, which is attributed to persistence and competition with turfgrasses in late summer
Flowers are pink to purple and present in the leaf axils. Other lespedeza species may also be found as weeds in turf but common lespedeza is the primary species in Georgia.
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