The earliest land plants preserved in Australia occur in deposits from the Upper Silurian and the Lower Devonian in marine sediments in Victoria, named the Baragwanathia Assemblage for its most prominent element, the simple vascular plant the lycopod "Baragwanathia". The assemblage also included Rhyniophyta, Zosterophyllophyta, and Trimerophyta in addition to other lycopods. All these plants were herbaceous, coastal and required an aqueous environment for reproduction. During the Devonian the first shrub-sized to tree-sized lycopods appeared in Australia and Antarctica; they dominated the flora until the Early Carboniferous. In the mid- to Late Carboniferous, as Australia drifted from equatorial latitudes to polar latitudes, the lycopods waned and were replaced by seed-ferns, and the "Nothorhacopteris"-"Fedekurtzia"-"Botrychiopis" complex.