Rydberg: Notes on Rosaceae — XIV 65 



A specimen from Decatur County, Iowa, collected by T. 

 J. and M. F. L. Fitzpatrick may also belong here. 



10. Rosa arkansana Porter 



This species was described from the Arkansas Canon near 

 Canon City. The type is a glabrous plant and so described. 

 The more common R. suffalta of the plains is densely pubescent. 

 This was mistaken for R. arkansana by Watson, who has been 

 followed by most American botanists. R. arkansana is found 

 in the prairie region as well, but is much more local. It seems 

 to be confined to the river valleys, while R. suffulta prefers the 

 prairies and plains. R. Rydbergii Greene is nothing but R.. 

 arkansana. The peculiar hue of the upper surface of the leaves, 

 so much emphasized by Dr. Greene, is due to some disease, 

 probably bacterial. Some of the leaves or some part of them 

 have retained their natural color on the upper surface. Best 

 regarded it as a variety of R. blanda. 



Minnesota: Winona, 1882, Hasse Herbarium. 



North Dakota: Fargo, Bolley 12Q, 130. 



Kansas: Comance County, 1897, Carleton 254. 



11. Rosa Lunellii Greene 



This is closely related to R. arkansana and perhaps only a 

 depauperate form of the same. It is, however, a much smaller 

 plant and more glaucous, and the leaflets are more rounded 

 at the apex. 



Manitoba: Brandon, 1887, Foivler; 1898, E. S. Thompson. 



North Dakota: Leeds, 1907 and 1908, Lunell. 



South Dakota: Hermosa, 1892, Rydberg 678a. 



Nebraska: Long Pine, 1893, W. R. Dudley. 



12. Rosa suffulta Greene 

 The first record of this species is in Hooker's Flora Boreali- 

 Americana, where Borrer referred it to a variety of R. stricta. 

 Crepin made it a variety of R. blanda and Watson confused it 

 with R. arkansana. Dr. Greene was the first to see that it was 

 not R. arkansana and proposed the name R. pratincola, over- 

 looking the fact that this name had been used before. Dis- 

 covering this fact twelve years later, he substituted the name 

 R. heliophila. C. K. Schneider discovered the same fact a year 

 later, but not knowing of Greene's last name, proposed R. 



