Prototaxites formed large trunk-like structures up to 1 metre (3 ft) wide, reaching 8 metres (26 ft) in height [...]

It was the tallest living organism in its day by far; in comparison, the contemporaneous plant Cooksonia only reached 6 centimetres (2.4 in) in height and itself towered over the "moss forests" that grew beneath it, and invertebrates were the only other land-dwelling multi-cellular life.

The landscape during this period must have looked super alien and weird in contrast with the post treepocalypse Earth we know today