SPECIES INFORMATION 



1. Classification and nomenclature. 



A. Species. 



1. Scientific Name. 



a. Binomial: Trisetum orthochaetum A. S. 

 Hi tchcock . 



b. Full bibliographic citation: Hitchcock, 

 A. S. 193^. New species, and changes in 

 nomenclature, of grasses of the United 

 States. Amer. J. Bot. 21: 13^-135. 



c. Type specimens: Holotype : Boggy meadow, 

 Bitterroot Mountains, alt. 1200 meters, 

 near Lolo Hot Springs, Missoula County, 

 Montana, July 23, 1908, Agnes Chase 

 5129 . US ( 1535753) . 



Topotype ; Boggy meadow, Lolo Hot 

 Springs, elev. 1220 m, Missoula Co., 

 Montana, July 9, 1951, LeRoy H. Harvey 

 A^61 . MONTU (MONT 36626). 



2. Pertinent synonyms: None. 



3. Common names: Missoula County oats, 

 Bitterroot trisetum. 



4. Taxon codes: PMP0A690A0 (Montana Natural 

 Heritage Program). 



5. Size of genus: About 75 species, in the 

 temperate to cold regions of both 

 hemispheres; nine species are reported for 

 the United States (Gould and Shaw, 1983). 



B. Family classification. 



1. Family name: Poaceae. 



2. Pertinent family synonym: Gramineae. 



3. Common name for family: Grass Family. 



C. Major plant group: Monoco ty ledoneae . 



D. History of knowledge of taxon: Prior to 1986, 

 Tr isetum orthochaetum had been collected only 

 twice, first in 1908, and subsequently in 1951. 

 The first collection was made near Lolo Hot 

 Springs, in Missoula County, Montana, by Agnes 

 Chase; this specimen became the holotype when A. 

 S. Hitchcock described it as a new species in 

 193^. Dr. LeRoy H. Harvey made the next 



