In certain vascular plants, esp. ferns: any of the vascular bundles comprising a dictyostele.

Botany. The axial cylinder in the stems and roots of vascular plants, developed from the plerome.

a type of stele typical of primitive plants (still found in, e.g., the seedling stages of many ferns) that lacks pith and consists of a solid core of…

A highly evolved stele, found in the stems of most dicotyledons, consisting of a central core of pith largely surrounded by discrete bundles of…

A single stele (vascular cylinder) in a stem or root.

a stele consisting of a core of pith surrounded by concentric layers of xylem and phloem.

A stele in which vascular bundles are distributed throughout the parenchymatous tissue.