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Cycadopsida

"Cycadopsida" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.

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A class of vascular seed plants also known as gymnosperms in the subdivision spermatophytina. They have large cones and pinnate leaves. Examples are pines, spruces, cedars and sequoias.


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