Sagina pilifera is a species of Sagina

Sagina

Sagina is a genus of 20–30 species of flowering plants in the family Caryophyllaceae. These are flowering herbs native to temperate regions of the Northern Hemisphere extending south to tropical mountain areas at high altitudes, reaching just south of the equator in Africa...

, native (and endemic) to the Mediterranean islands of Corsica

Corsica

Corsica is an island in the Mediterranean Sea. It is located west of Italy, southeast of the French mainland, and north of the island of Sardinia....

 and Sardinia

Sardinia

Sardinia is the second-largest island in the Mediterranean Sea . It is an autonomous region of Italy, and the nearest land masses are the French island of Corsica, the Italian Peninsula, Sicily, Tunisia and the Spanish Balearic Islands.The name Sardinia is from the pre-Roman noun *sard[],...

, where it grows in mountains at altitudes of 1,000–2,700 m. It is a prostrate herbaceous

Herbaceous

A herbaceous plant is a plant that has leaves and stems that die down at the end of the growing season to the soil level. They have no persistent woody stem above ground...

 plant growing to 2–8 cm tall, with white flower

Flower

A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants . The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs...

s 1 cm in diameter.

Plants from northwestern Europe reported as this species are based on misidentification of Sagina subulata

Sagina subulata

Sagina subulata is a species of Sagina, native to Europe, from Iceland south to Spain, and east to southern Sweden and Romania...

.