448 Rydberg : Rocky Mountain flora 



rather than with H. Richardson i. The rays are, however, not 

 so broad or so decidedly cuneate as in that species. The following 

 specimens belong to H. Macouni. 



Saskatchewan: 1858, Boiirgeaii; Cypress Hills, 1880, John 

 Macoun; Medicine Hat, 1894, John Macoiin 5077; Bare Hills, 

 1906, Macoun &" Herriot 72840. 



Montana: "Northwest Boundary," 1874, Coues; Falls of 

 Missouri, 1886, R. S. Williams 4520; Midvale, 1903, Umbach 

 ijo; Manhattan, 1895, Rydberg 2Qj6. 



Hymenoxys Greenei (Cockerell) Rydb. comb. nov. 

 Picradenia biennis Greene, Pittonia 3: 272, in part. 1898. 



Not Actinella biennis A. Gray. 1878. 

 Hymenoxys Lemmoni Greenei Cockerell, Bull. Torrey Club 31: 



479. 1904. 



I think this is specifically distinct from Hymenoxys Lemmoni. 

 The best character to distinguish the two was not pointed out 

 by Professor Cockerell or by Dr. Greene. The inner bracts 

 in Palmer 261, the type number of H. Greenei, of which there are 

 five specimens on two sheets in the Columbia University her- 

 barium, are broadly obovate and more or less erose-dentate on 

 the margins, while in all specimens seen of H. Lemmoni they 

 are elliptic and entire. Watson 616, from Nevada and referred 

 to the subpecies Greenei, belongs to //. Lemmoni. 



Dugaldea 



Professor Nelson included in this genus Hymenoxys heleni- 

 oides Cockerell {Picradenia helenioides Rydb.), on what ground 

 I do not know. Both I, who, with Mr. Vreeland, discovered 

 the plant, studied it in the field, and described it, and Professor 

 Cockerell, who has spent so much time on Hymenoxys, believed 

 it a good species of that genus. In Dugaldia Hoopesii the bracts 

 are in more than two series, distinct, and in age reflexed; in 

 Hymenoxys helenioides they are as in the rest of that genus not 

 reflexed, in strictly two series, and those of the outer series 

 are united at the base. 



Dysodia 



Nelson in the New Manual has evidently given Dysodia Cav. 

 the same limitation as it has in Engler & Prantl's Pfianzen- 



