Cerastium glomeratum aka Mouse Ear Chickweed

Cerastium glomeratum is an annual in the carnation family, Caryophyllaceae. Its common names include sticky chickweed and sticky mouse-ear. NC State lists its native range as Europe and Asia. The RHS also records it as native to Britain and Ireland. It has spread to other continents beyond its native range. It grows in fields, lawns, roadsides, and other disturbed ground. In gardens, its spread can make it a weed.

Plants reach 0.5–1.5 feet (0.15–0.46 metres) tall. They spread about 0.8–1.5 feet (0.25–0.46 metres) wide. Growth may stay low or rise on upright stems. The plant can soon form mats and spread through seed. Its round stems range from green to purple. Both stems and leaves bear glandular and non-glandular hairs. These hairs give the plant a pale, gray cast. The stems have no scent.

The simple leaves grow in opposite pairs along the stems. Their shapes range from egg-shaped to oblong or wider-tipped. Each leaf has a smooth edge rather than teeth. Sticky hairs cover both sides of the green leaves. Leaves reach about 0.06 feet (0.019 metres) long. Small white flowers appear from late winter through spring. The flowers form clusters called cymes and have a star-like shape. Each flower has five split petals and five hairy green sepals. Flowers measure about 0.02 feet (0.006 metres) across. Small capsules follow the flowers and hold several seeds. Tiny teeth mark the openings through which the capsules release seed.

This plant grows in full sun or partial shade. It accepts sandy, loamy, and clay soils. Moist soil with good drainage suits it best. It also tolerates dry spells and occasional soil dryness. NC State rates its growth as medium. Plants die back after they set seed, particularly in hot climates. Seed provides the means to grow new plants. Its value to wildlife includes food for birds.

The leaves are edible, and the plant has a history of herbal use. The supplied sources give no details about preparation or medical effects. Spider mites, mealybugs, aphids, and thrips may attack it. Root rot and powdery mildew can also cause problems. Small patches can be removed by hand. Mulch can help stop seeds from sprouting. NC State also lists mowing and post-emergent herbicides as control methods.