If humans had been present to build log structures during the Carboniferous period though 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 dominant plant types that grew to massive sizes and therefore would have been suitable sources of logs for human use. Bryophytes and charophytes were too small to be used as logs, and whisk ferns and epiphytes do not grow in a manner that produces large enough structures to be used as logs.

If Humans Had Been Present to Build Log Structures During