Creeping buttercup spreads by extensive stolons that can quickly take over large areas of thinned turf. Leaves are dark green and divided into three segments. The flowers are small, bright yellow, and cup-shaped. Stems grow horizontally above ground and root at the nodes. Creeping speedwell produces small blue and white flowers in spring.
Seed capsules are heart-shaped.
Dandelion is the best-known and perhaps the most common perennial turfgrass weed in Pennsylvania. It forms a rosette of long, narrow, and strongly lobed leaves. Dandelions produce thick taproots that can penetrate up to several inches into the soil. It has finely divided leaves that give off an acrid odor when crushed. The plant can grow up to six inches tall, but it has the ability to escape damage by lawn mowers.