This weed grows in thin turf during cool weather. Cinquefoil is a perennial weed that grows in low-fertility soils and spreads by stolons. Depending on the species, leaves have three to five leaflets with serrated margins. Flowers of cinquefoil are small and bright yellow, and have five petals. 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.