Article: A Middle Triassic flora from the Cacheuta Formation, Minas de Petroleo, Argentina

The fossil flora of the Triassic beds of Minas de Petroleo, a locality about 32 km. south-west of Mendoza in western Argentina (long. 69° 6' 25' W.; lat. 33° 3' 35' S.) is described. The strata belong to the Potrerillos Beds of the Cacheuta Formation of the Upper Gondwana of Argentina. The flora consists of about 34 species (3 new), belonging to about 20 genera (one new). Previously the flora of the Potrerillos Beds was known to consist of about 28 species. These beds were earlier referred to as the 'Rhaetic beds' and lately as of 'Lower to Middle Keuper' age, but the flora is now shown to be not younger than Middle Triassic in age.