| # Festuca of North America |

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

### Festuca scabrella Torrey in Hook.

Fl. Bor. Amer. 2: 252, tab. 233. 1840. F. altaica subsp. scabrella (Torrey) Hultén, Fl. Alaska and Yukon 1: 241. 1942. F. altaica var. scabrella (Torrey) Breitung, Am. Midl. Natl. 58: 12. 1957. Type: Canada. Alberta: Rocky Mountains, 1826, T. Drummond 187; Holotype: originally at NY, Torrey Herbarium. "Ex. Herb. Torrey". Isotype: GH! Alexeev (1982) noted that the syntypes "Drummond" numbers "71, 187, 212" are at K and NY!

Notes. Synonym of F. altaica. In examining the isotype and possible second isotype collections of Drummond from GH, in 1994, (see image library) the first author agreed with the annotations made by L.E. Pavlick (Sept. 1981) that these specimens are plants of F. altaica sensu stricta. F. scabrella var. major Vasey = F. campestris Rydb., F. scabrella Torrey in Hook. subsp. hallii (Piper) W.A. Weber = F. hallii Vasey.

We advise against extracting comparative information from the descriptions. This is much more easily achieved using the DELTA data files or the interactive key, which allows access to the character list, illustrations with detailed captions, full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa. See also Guidelines for using data taken from Web publications.

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: 14th February 2019. delta-intkey.com’. Aiken, Dallwitz, McJannet, and Consaul (1997) should also be cited (see References).

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