Corn speedwell is a very small, weak, low growing plant that starts growth in late winter or early spring. It thrives in thin, open turf and often appears in solid stands. This annual grows vigorously during cool temperatures, but starts to disappear in extremely hot weather. The lower leaves of corn speedwell are rounded and toothed, while the upper leaves are small, pointed and indistinct. The entire plant is covered with soft, fine hairs. Corn speedwell is best known for its small, bright blue flowers and its heart-shaped seed capsules.