Cerastium semidecandrum aka Five Stamen Mouse Ear Chickweed

Cerastium semidecandrum is a small annual in the Caryophyllaceae family. Its English common name is little mouse-ear. The RHS also lists the Welsh name clust-y-llygoden fach. Its native range covers Europe and the Mediterranean region. It extends east into Central Asia and Afghanistan. Kew places it within the temperate biome. The RHS confirms that it is native to Britain and Ireland.

This plant reaches about 0.7 feet (0.2 metres) in height. It completes its life cycle as an annual. The supplied sources give no spread or time to maturity. They also lack species-level details about its leaves and stems. Flowers appear from April to May, according to Plants For A Future. Each flower has both male and female organs. Insects pollinate the flowers, and the species is self-fertile. The evidence gives no details about its fruit.

In the wild, it grows in dry, open places. Plants For A Future links it with sandy or calcareous soils. Its cultivation notes allow sand, loam, and clay. They also cover mildly acid, neutral, and mildly alkaline ground. The plant needs an open site rather than shade. Despite its dry natural habitats, the same source lists moist soil as its preference. These records describe habitat and growing needs from different angles. They do not establish a watering schedule or a hardiness zone.

Plants For A Future lists cultivated beds as a setting. It suggests raising plants from seed in spring under a cold frame. Seedlings can move into separate pots once large enough to handle. The suggested next step is planting them out in summer. The source makes clear that this method is a suggestion. It does not report a tested propagation method for this species. No other practical uses are recorded in the supplied evidence.

The leaves have a recorded food use. Plants For A Future describes cooking the young plant before flowering. It gives the species an edibility score of two out of five. The source lists no known hazards and no medicinal uses. A lack of known hazards does not establish safety for pets. It reports no weed potential for this species. The supplied material names no pests or diseases.