This fossil specimen features a well-defined Glossopteris browniana leaf preserved on a fine-grained sedimentary matrix, measuring 11.7 x 8.5 x 2.1 cm. The leaf displays the classic elliptical shape with a distinct central midrib and subparallel venation pattern typical of the genus. Though slightly smaller than some counterparts, the specimen retains clear surface detail, capturing the delicate structure of this iconic Permian plant.

It was collected from Cobbora, in the Central West District of New South Wales, and derives from the Dunedoo Formation within the Illawarra Coal Measures. This geological formation dates to the Late Permian period, approximately 251 to 260 million years ago, and is renowned for its abundant and well-preserved Glossopterid flora. The Dunedoo Formation provides crucial paleoenvironmental context for understanding swampy, coal-forming ecosystems of Gondwana just before the end-Permian mass extinction.

This specimen represents Glossopteris browniana, first described by Brongniart in 1892. As a key species of the genus, G. browniana has been central to studies of Permian plant evolution and the paleobotanical correlation of Gondwanan continents. Its presence here adds to the paleontological significance of the Cobbora fossil flora.

This specimen is provided with a Certificate of Authenticity and a Geological Time Scale.