Chemical Evidence for Separating the Psilotaceae from the Filicales

23 December 1977

journal article
research article
Published by American Association for the Advancement of Science (AAAS) in Science

Vol. 198 (4323) , 1260-1262
https://doi.org/10.1126/science.198.4323.1260

Abstract

The distribution of flavonoid compounds in Psilotum, Tmesipteris, and primitive filicalean ferns shows that it is unlikely the two groups are closely related. The Psilotaceae synthesize only amentoflavone and related biflavonyls which are totally absent from ferns. The primitive ferns contain the full complement of flavonols and proanthocyanidins, as found in all other filicalean families.

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