Extinct arborescent plant, Sigillaria genus, of the Carboniferous era. Coal forest era. Illustration from Wilhelm Bolsches Das Leben der Urwelt, Prehistoric Life, Georg Dollheimer, Leipzig, 1932.
Extinct arborescent plant, Sigillaria genus, of the Carboniferous era. Coal forest era. Illustration from Wilhelm Bolsches Das Leben der Urwelt, Prehistoric Life, Georg Dollheimer, Leipzig, 1932.