RypDBERG: NoTrEes 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 Cafion near 
* Cafion City. The type is a glabrous plant and so described. 
The more common R. suffulta 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. Rydbergit 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. 
Nortu Dakota: Fargo, Bolley 129, 130 
Kansas: Comance County, 1897, Carleton 254. 
Ir. 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. 
Manitosa: Brandon, 1887, Fowler; 1898, E. S. Thompson. 
Nortu Dakota: Leeds, 1907 and 1908, Lunell. 
Soutu 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. 
Crépin 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, 
