(from the article `lower vascular plant`) ...generally the layer giving rise to the branches in roots, and the endodermis seems to regulate the flow of water and dissolved substances from the ... The condition of the xylem, the woody elements in the stem, defines several categories. The protostele has a solid xylem core; the siphonostel...
When a plant's vascular tissue develops as a central cylinder, it is said to have a siphonostele. See also protostele and eustele.
When a plant's vascular tissue develops as a central cylinder, it is said to have a siphonostele. See also protostele and eustele.
siphonostele The hollow vascular cylinder, or vascular bundle, of a stem, which may contain pith.