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I. SPECIES INFORMATION 



1. Classification and nomenclature. 



A. Species. r 



1. Scientific name. 



a. Binomial: Cirsium lonqistylum Moore & 

 Frankton 



b. Full bibliographic citation: Moore, R.J., 

 and C. Frankton. 1963. Cytotaxonomic 

 notes on some Cirsium species of the 

 western United States. Canadian Journal 

 of Botany 41:1553-1567. 



c. Type specimens: Senn. Frankton & Gillett 

 5666 , August 23, 1951 Montana, Cascade 

 Co., Little Belt Mtns., 3 mi SE. of 

 Monarch (Holotype, DAG) . This collection 

 consists of three sheets, one bearing a 

 rosette only (Moore and Frankton 1963) . 



2. Pertinent synonyms: None. 



3. Common name: long-styled thistle 



4. Taxon codes: PDAST2E1P0 (Montana Natural 

 Heritage Program); 3618 CIRLON, (U.S. Forest 

 Service, Region 1) . 



5. Size of genus: The genus Cirsium occurs 

 throughout the northern hemisphere 'and contains 

 about 200 species, about 50 of which are native 

 to North America (Cronquist 1955) . Eleven 

 native species occur in Montana along with two 

 introduced (non-native) species from Eurasia 

 (Dorn 1984) . 



B. Family classification. 



1. Family name: Asteraceae. 



2. Pertinent family synonym: Compositae. 



3. Common names for the family: Sunflower Family. 



C. Major plant group: Dicotyledoneae. 



D. History of knowledge of taxon: The earliest known 

 specimen ( Flodman 880 19 August 1896, Long Baldy, 



