The Aneurophytales are an extinct order of progymnosperms, considered among the earliest plants to produce true wood via a vascular cambium. They represent a crucial evolutionary link between simpler
Tetraxylopteris is a genus of extinct vascular plants of the Middle to Upper Devonian. Fossils were first found in New York State, USA. A second species was later found in Venezuela.
Aneurophytales
…a lobed or actinostelic stele with secondary xylem. Some species, like Aneurophyton, likely grew as shrubs or climbing vines, while others such as Tetraxylopteris may have had non-self-supporting aerial stems…