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
Derived forms
protostelic (ˌprotoˈstelic)
adjective
protostele in American English
(ˈproʊtəˌstil; ˈproʊtoʊˌstili)
noun
a simple, primitive arrangement of conducting tissues in stems and roots of certain lower plants, consisting of a solid cylinder of xylem surrounded by a layer of phloem