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Nomenclatural Notes on Dryopteris Adans.

C. R. Fraser-Jenkins and A. C. Jermy
Taxon
Vol. 25, No. 5/6 (Nov., 1976), pp. 659-665
DOI: 10.2307/1220132
Stable URL: http://www.jstor.org/stable/1220132
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Nomenclatural Notes on Dryopteris Adans.
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Abstract

Dryopteris oreades Fomin replaces the name D. abbreviata (DC.) Newman for one of the sexual diploid species in the D. filix-mas (L.) Schott aggregate on two main grounds. First, the original concept of de Candolle was not that of the sexual diploid taxon; however the actual identity of de Candolle's taxon, though probably D. pseudomas (Wollaston) Holub & Pouzar, is open to considerable doubt and cannot now be ascertained. Various interpretations have been followed with a preponderance in favour of its incorrect application to the sexual diploid taxon. Thus the name Polystichum abbreviatum DC. has become a long-persistent source of error and it should be regarded as a nomen ambiguum. Secondly, the taxon P. abbreviatum DC. was accepted in Dryopteris by Newman at varietal rank only and he did not make the combination D. abbreviata (DC.) Newm. so frequently attributed to him. Moreover the combination can no longer be made because of the publication of D. abbreviata (Schrad.) O. Kuntze (1891), based on Aspidium abbreviatum Schrader, an unrelated taxon.

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