Latus, formerly -stlatus-, has no connection with Latium.
3.

A French statist, Dureau de la Malle (-Econ.

Pol.

des Romains-, ii.

226), compares with the Roman Campagna the district of Limagne in Auvergne, which is likewise a wide, much intersected, and uneven plain, with a superficial soil of decomposed lava and ashes--the remains of extinct volcanoes.