polystelen.
/ˈpɒlɪstiːl/, /ˈpɒlɪstiːli/, U.S. /ˈpɑliˌstil/, /ˈpɑliˌstili/ Botany.
A stele in which vascular bundles are distributed throughout the parenchymatous tissue.
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the world > plants > part of plant > cell or aggregate tissue > [noun] > tissue > stele
meristele1894
stele1895
protostele1901
eustele1902
monostele1902
siphonostele1902
polystele1904
1904 Bot. Gaz. 38 178 Concerning Van Tieghem's types, the polystele need not be considered, for no monocotyledon has yet been found with internal phloem.
1925 A. J. Eames & L. H. MacDaniels Introd. Plant Anat. v. 133 In contrast with the monostele was the ‘polystele’, a type of stele in which the vascular tissues are in the form of strands.
1965 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) 136 We come..to the polystele, consisting of a system of individual vascular bundles, distributed over the whole of the transverse section.
1992 M. Ingrouille Diversity & Evol. Land Plants 75 Several separate steles may be produced in a stem, either concentric,..as in some ferns like bracken, Pteridium, or running in parallel, a polystele, as in some dicotyledons.
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
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n.1904