342 BOTANICAL GAZETTE [November 



Princeton, July 24, 1905, idem (Hb. Can. 77000); Yale, grassy slopes, May 17, 

 1889, John Macoun (Hb. Can. 15120); Spence's Bridge, damp grassy places, 

 May 28, 1889, idem (Hb. Can. 15130); Fraser River, west of, damp grassy 

 places, June 10, 1875, idem (Hb. Can. 15121); Kicking Horse Lake, Rocky 

 Mts., July 18, 1885, idem (Hb. U.S. 219795). 



Alberta: Jasper Park, at Shovel Pass, low ground near a brook, alt. 

 6000-6500 ft., August 20, 1918, James M. Macoun (Hb. Can. nos. 98686, 

 98687, and 98688 in Hb. Field, 483386, 483387, and 483388, respectively); 

 Island Creek, north of Peace River, July 15, 1903, idem (Hb. Can. 61240); 

 Bragg's Creek, foothills south of Calgary, July 16, 1897, John Macoun (Hb. 

 Can. 22776); Calgary, 3 miles west of, along railroad, June 7, 1897, idem 

 (Hb. Can. 22792); Banff, swamps, June 27, 1891, idem (Hb. Can. 15127); 

 St. Ann, June 9, 1898, W. Spreadborough (Hb. Can. 19744)- 



Utah: Uintah Mts., above Bear River, alt. 12000 ft., August 1869, Sereno 

 Watson 723 (Hb. U.S. 41937); Marysvale, alt. 6000 ft., May 21, 1894, Marcus 

 E. Jones 5338 (Hb. U.S. 326832; a very unique specimen with exterior bracts 

 of involucre greatly elongated and almost equal to the interior bracts, the 

 flowering head over 5 cm. wide). 



California: Bear Valley, San Bernardino County, alt. 6500 ft., June 3, 

 1901, S. B. Parish 4977 (Hb. U.S. 414859). 



Besides the specimens cited, I have examined a number from 

 the locality (Kamchatka; also Bering Island, Commander Islands, 

 etc.) whence Ledebour obtained his type. Most of the material 

 from that vicinity, from the Aleutian Islands, and from Alaska 

 proper, has the outer bracts tending to be rather short, ovate, and 

 notably blackish when dried, with the scarious margins highly 

 distinct. This character is not constant, however, and there are 

 numerous variations seen. South of Alaska, nearly every speci- 

 men examined has longer, more lanceolate bracts, which tend to 

 remain pale or dark green when dried. Even here, however, there 

 are some marked exceptions to the rule. Thus, for example, 

 Standley 4022 from New Mexico (Hb. U.S. 49 8 4 l6 ) h as the- dark, 

 scarious-margined, ovate outer bracts typical of the Alaskan 

 material. 



Green (Pittonia 4:228. 1901), writing upon Taraxacum in 

 North America, named the Bering Sea form T. Chamissonis? 



1 While Greene cited no type, many of the Bering Sea specimens listed (in Hb. 

 Can. and Hb. U.S.) had been examined by him and are labeled T. Chamissonis in 

 his own handwriting. As noted, the specimen by J. M. Macoun from St. Paul Island 

 (Hb. Can. 20481) had been labeled "typical" by him and may be regarded as being 

 practically type material. 



