Festuca of North America
Byull. Mosk. O-va Ispyt. Prir. Otd. Biol. 88: 103. 1983. Type: U.S.A. South Carolina: Greenville Co., grassy abandoned lawn 4 miles west of Marietta, 1 June 1969. W.T. Batson s.n. Holotype: S.
Described by Alexeev (1983). This may be an introduced species and possibly a cultivar of F. valesiaca Schleich. ex Gaud. Compare the leaf cross section of F. mariettana in Alexeev (1983) with the leaf cross section of F. valesiaca Schleich. ex Gaud. illustrated in the image library. Alexeev (1983) stated that this is one of the numerous species which occupy an intermediate position between the "sulcate" (subsect. Intravaginales Hack.) and the "rubroid" fescues (subsect. Extravaginales Hack.) in the system of the genus. In the anatomical structure of the laminae, the degree of closure of the sheaths and a number of other characters, F. mariettana is similar to the Arizona endemic F. calligera (Piper) Rydb., but differs in having smooth leaves. Alexeev (1983) speculated that it is probably endemic in the mountain meadows of the Appalachians. This has not been investigated.
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).