Jepson Flora Project: Jepson Interchange for California Floristics    
click for enlargement
Athyrium distentifolium Opiz var. americanum (Butters) Cronquist
ATHYRIACEAE (genus previously included in Woodsiaceae, and before that, Dryopteridaceae)

Information from the Index of California Plant Names (ICPN)
Current Jepson Flora Project Synonyms Athyrium alpestre var. americanum Butters illeg.
Initial Editorial Analysis 16 May 2007
Source of Report for California Correspondence 1
Correspondence and Comments Subsequent to Initial Analysis
Correspondence 1 Treatment and author notes submitted for The Jepson Manual [Ed. 2] by Alan R. Smith see Comment 1
Editorial Comments 1 Correspondence 1 indicates, with reference to Kartesz & Gandhi (1991. Phytologia 70:196-197), that for The Jepson Manual [Ed. 2] Athyrium alpestre var. americanum Butters is to be treated as an illegitimate name for Athyrium distentifolium Opiz var. americanum (Butters) Cronquist, essentially because Athyrium alpestre Clairv. (1811) is a later synonym of Athyrium filix-femina, and because Athyrium alpestre Milde (1867), based on the nomenclaturally superfluous Aspidium alpestre Hoppe (1805), is a later homonym [and therefore illegitimate]. Correspondence 1 also indicates that some (e.g., Lellinger, Tryon) have regarded, in perhaps an equally reasonable interpretation, the de Clairville name as published in a non-technical work (according to Tryon, in a pers. comm. to Lellinger, it is "an excursion flora in which the introduction states that it is not a technical work"), and hence not validly published [an interpretation that would render Athyrium alpestre Milde legitimate, in that it would no longer be a later homonym], but that according to Art. 29.4, ICBN [1988 Code; Art. 30.3 in the 2000 or St. Louis Code] publication in "trade catalogues or non-scientific newspapers" on or after 1 January 1953 does not constitute effective publication, so that publication in such literature before this date does [which renders Athyrium alpestre Milde a later homonym and therefore illegitimate since the earlier homonym, Athyrium alpestre Clairv., was published before the effective date of the Article that otherwise would have rendered it illegitimate].
Editorial Summary and Current Status
Editorial Summary addition, new name for taxon treated in The Jepson Manual [Ed. 1]
Current Status JFP-1, accepted name for taxon native to CA
Current Status Authority The Jepson Manual [Ed. 2]
Current Status Date 16 May 2007
List of names for this Current Status category
List of ICPN names in Athyrium distentifolium
List of names from ICPN, Hrusa's Crosswalk, and Jepson Flora in Athyrium

Resources of the Jepson Flora Project: External links:
·Distribution maps: County distribution based on CCH specimens
Manual imageJepson eFlora
link image ·Consortium of California Herbaria specimen records (includes links to BerkeleyMapper)
· Jepson eFlora page with bioregion map and CCH specimen records
Manual imageArchived Indexes from The Jepson Manual (1993; TJM1)
Site Search Search this site in Google for other references
calphotos logo 2Cal Photos images
Common names
link image IPNI
link image Tropicos Taxonomic information from the Missouri Botanical Garden
Calflora: Taxon report · Distribution · Observations
link image KBD Kew Bibliographic Database
Google Scholar Google Scholar
Google Books
link image JSTOR Plant Science

University & Jepson Herbaria
Copyright by the Regents of the University of California