The Gorstian Age (427-425 Ma) occurs during the Ludlow Epoch of the Silurian Period. It occurs after the Homerian age and before the Ludfordian age.
426.7±1.5–425.0±1.5 Ma
Baragwanathia longifolia, Salopella australis, Hedeia sp. have been reported from Victoria, Australia (Tims and Chambers, 1984)
Baragwanathia represents the earliest known vascular plant to possess leaves (microphylls)