cast of the inside of a calamodendron stem fossil specimen

ancient annularia antique arborescent art artwork avant black botany calamitaceae calamites calamodendron carboniferous carinatus cast drawing engraved engraving equisetales equisetopsida etching extinct flora fossil fossilized fragment horsetail illustration impression man monde old paleobotany picture plant plantae prehistoric primitive pteridophyta sketch specimen stem suckowi tree treelike trunk undulatus vector vintage white world