Protostele
noun, Botany.
1.
the solid stele of most roots, having a central core of xylem enclosed by phloem.
noun
1.
a simple type of stele with a central core of xylem surrounded by a cylinder of phloem: occurs in most roots and the stems of ferns, etc
protostele
(prō’tə-stēl’, prō’tə-stē’lē)
The most primitive form of stele, consisting of a solid core of xylem encased by phloem or of xylem interspersed with phloem. The roots of all vascular plants, as well as the stems of lycophytes, have protosteles.
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