If humans had been present to build log structures during the Carboniferous period (they were not), which plant types would have been suitable sources of logs?

Question

Quizplus · Accepted Answer

During the Carboniferous period, ferns, horsetails, and lycophytes were the main plant types that grew to large sizes and were abundant enough to provide logs for building structures. Charophytes (stoneworts) were aquatic algae and gymnosperms did not appear until later in the Mesozoic era. Bryophytes also grew during this time, but they were not as large and sturdy as the other plant types listed.

If Humans Had Been Present to Build Log Structures During