On: Long before trees overtook the land, Earth was covered by prototaxites (2013)

[klyrs]

Around the same era, there were giant horsetails too -- up to 30m tall!

https://www.indefenseofplants.com/blog/2015/5/21/ancient-equ...

[lproven → klyrs]

Not 'til much later, which is the point of the piece.

When prototaxites ruled, the next tallest thing was ~6cm.