This annual clover with a Mediterranean distribution is present in all regions of Italy except in the Valle d'Aosta and Trentino-Alto Adige. It grows in uncultivated dry grasslands, on rather acidic siliceous soils that are often volcanic in nature, from sea level to about 1000 m. The species sporadic in the outer belt of the Sardinian temporary ponds, in contact with dry grasslands. The genus name derives from the Latin word 'tri' (three) and 'folium' (leaf), referring to the leaves, that are divided into 3 leaflets; the species name refers to the shape of the fruiting heads. Flowering period: April to June.

Italian name(s): Trifogghiu (Sicilia, Etna), Trifoglio glomerato (Italia).