Festuca of North America

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S. G. Aiken, M. J. Dallwitz, C. L. McJannet, and L. L. Consaul

Festuca oregona Vasey

Nomenclature

Bot. Gaz. 2: 126. 1877. Type: U.S.A. Oregon: 1892, C.V. Piper. US.

Habitat and Distribution. Northwestern USA: Oreg., Wash.; Southwestern USA: Calif.

Notes

Recognized as a distinct species by Alexeev (1982), who cited five specimens collected from Washington to California. He claimed that the species resembles Eurasian sulcate fescues of the group F. ovina subsp. laevis Hack. in having dense tufts, smooth leaf blades with 3 sclerenchyma strands, 3–5 veins and 7 vascular bundles. Alexeev (1982) stated that this is not as Hitchcock and Chase (1951) suggested, a synonym of F. rubra L. The leaf cross sections illustrated by Alexeev (1982) appear similar to that of F. valesiaca Schleich. ex Gaud. that has been introduced in some areas. In Oregon, specimens of F. idahoensis subsp. roemeri (Pavlick) S. Aiken often have similar leaf cross sections (B.L. Wilson, personal communication, 1995).

L.E. Pavlick in 1984 annotated a specimen that Alexeev considered may be a type of F. oregona, a Vasey collection, US 556161, as "F. rubra L. subsp." and with the words, "this is not Festuca oregona Vasey Bot. Gaz. 2: 126. It does not match Vasey's descriptions, which was published in 1877, 15 years before this specimen was collected."


The interactive key provides access to the character list, illustrations, full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting specified attributes, and summaries of attributes within groups of taxa.

Cite this publication as: ‘Aiken, S.G., Dallwitz, M.J., McJannet, C.L. and Consaul, L.L. 1996 onwards. Festuca of North America: descriptions, illustrations, identification, and information retrieval. Version: 19th October 2005. http://delta-intkey.com’. Aiken, Dallwitz, McJannet, and Consaul (1997) should also be cited (see References).

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