3 ms·

Around the same era, there were giant horsetails too -- up to 30m tall! https://www.indefenseofplants.com/blog/2015/5/21/ancient-equisetum https://www.indefens

• lproven 4y ago
  Not 'til much later, which is the point of the piece. When prototaxites ruled, the next tallest thing was ~6cm.