This weed is most common in shaded areas, but it can also grow in full sun. As with other members of the mint family, stems are square. Flowers are violet to purple and are produced in dense clusters at the tips of branches. Henbit is a winter annual weed that has oppositely arranged leaves with lobed margins. Flowers occur in the axils of upper leaves.
Henbit is found in moist soils and can be especially troublesome in turf during early spring.
Mallow is a biennial most often found in poorly maintained and underfertilized turf. Mallow produces sprawling branches that form nodes that do not root. Flowers are pink to lavender and are produced in the axils of leaves and stems. Prostrate knotweed is a low-growing summer annual that is well adapted to compacted, highly trafficked areas such as along sidewalks, in athletic fields, and in golf course cart paths. Each leaf is elliptical, tapering to a rounded tip.