eustele

(yo̵̅o̅′stēl, yo̵̅o̅ stē′lē)

noun

the typical vascular cylinder of a dicotyledonous plant or a gymnosperm, consisting of a ring of collateral bundles of xylem, cambium, and phloem

Origin: eu- + stele

See eustele in American Heritage Dictionary 4

noun

The central cylinder in which the primary vascular tissue is arranged around a pith, as in most seed plants.

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