Cerastium fontanum, also called mouse-ear chickweed, common mouse-ear, or starweed, is a species of mat-forming perennial or, rarely, annual plant.

[1][2] Cerastium fontanum is a low growing plant covered with small hairs which are not sticky, that is, without glandular tips.

The petals are shorter than the sepals or a little longer and are deeply divided.

[7] Cerastium is derived from the Greek word for 'horned', in reference to the shape of its fruit capsule.

[8] Fontanum means 'of fountains', 'of springs', or 'of fast-running streams'.