Solenostele

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Solenostele

 

a type of structure characteristic of the central cylinder of the stem of ferns; a siphonostele in which the xylem is surrounded on two sides by phloem. The interior phloem is the outer boundary of the parenchymal heartwood.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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Nevertheless, such steles have been variously termed "eusteles," or "solenosteles of the Equisetum type," and so forth (Schmid, 1982).