This annual grass is naturalised on sand dunes in the Channel Islands and S. England. Elsewhere it occurs as a casual garden escape or introduction from wool shoddy or grain, on walls, pavements, roadsides, rubbish tips and in car parks. Lowland.
L. ovatus was introduced to cultivation in Britain by 1640 and is widely grown in gardens. It was first recorded in the wild in 1791 in Guernsey, where it has long been naturalised. Deliberate attempts to establish it in Jersey were eventually successful in the 1860s. It appears to be increasing as an established alien on sand dunes in S. England.
A Mediterranean-Atlantic species; widely naturalised in N. & S. America, S. Africa, Australia and elsewhere.