The Petrosani Basin is a typical intramontaneous depression, limnic basin with a rich compressive Oligocene (Chattian) coal generating flora. Coal mining is still active in the Petrosani Basin, mainly due to the post-communist social pressure than to economical reasons. Nevertheless, coal mining is the reason for high quality flora collecting conditions, similar to those of the Resita Basin for Early Jurassic plants, from Sirinia Basin, for Late Paleozoic and Early Jurassic plants, or from Oltenia basin for Pliocene plants. Cuticles are often preserved, too. recently, Givulescu (1996) published a monograph about the Oligocene flora of the Petrosani Basin. A geological and paleontological synthetic approach is that of Pop (1993).