Polythecophyton was a genus of Early Devonian (420 to 390 million years ago) aneurophyte with branching axes, drooping, many-branched sporangia, but no trace of a vascular system.

[1] It grew to several centimetres in length, and its axes were almost a centimeter across.

[1]

This article related to a Devonian plant is a stub.

You can help Wikipedia by expanding it.