One distinct feature of knotweed is the papery sheath at the base of each leaf. Flowers are very small and white, and grow in the leaf axils. When broken or cut, the stems exude a white, milky substance. Flowers of spotted spurge are very small and pink or white. This species is common in newly established turf and frequently occurs in mature turf that has been thinned by insect attack.
Stems are thick, sprawling, and red.
Leaves are thick and fleshy, light green and wedge-shaped. Flowers are small and yellow. Purslane is a prolific seed producer and seeds may lie dormant in soil for many years before germinating. Clover is a very common weed in nearly all turfed areas. Although some homeowners do not find clover objectionable, its creeping growth habit can overtake turf and form large dark-green patches.