RYDBERG: NOTES ON ROSACEAE—XIV 71 
Flora of Colorado. Later I have had access to Prince Maxi- 
milian’s Reise and found that the plant described there was the 
glabrous plant or the true R. Woodsii. In my Flora of Colorado 
I made another mistake, adopting the name R. Macounii 
for the glabrous plant, depending upon the impression I had 
received from Greene’s rather vague description. After having 
seen Greene’s type, though this does not represent the common 
form of the species as I know it, I came to the conclusion that 
the name R. Macounii should be adopted for the species here 
treated, being the oldest available name. R. grosseserrata E. 
Nelson was a mixture, but the type evidently belongs to the 
large-leaved form of this species not uncommon in the Central 
Rockies. R. subunda Lunell represents a depauperate form and 
R. naiadum the more common form of the plains and prairie 
region. 
MINNESOTA: Montevideo, Moyer 372. 
Nortu Daxota: Kuhn, La Mouse County, Brenckle; 
Minot, Lake Ibsen, Jamestown, Tower, and Butte, Lumnell 
(without numbers). 
SoutH DaKxota: Hermosa and Hotsprings (Black Hills), 
Rydberg 677; Wolf Creek, Visher 2189; Bear Creek, Visher 
2032; Mobridge, Moyer 691, Big Stone Lake, 542 
_ NEBRASKA: Chadron, J. M. Bates; Lawrence Fork, Rydberg 
102; Banner County, Rydberg 98; Hay Springs, MacDougal 102; 
Nattick, Thomas County, Rydberg 1848. 
25. ROSA PYRIFERA Rydberg 
This is a species of the Northern Rocky Mountains, first 
mentioned by Watson ina note under R. Fendleri.* It differs in 
the pear-shaped fruit and the more numerous, rather corymbose 
flowers. A few rather dubious specimens have been collected in 
the plains and prairie region. These have fruits which are 
inclined to be ellipsoid, rather than pyriform. Among them 
may be noticed. 
SoutH DaKxota: Mobridge, Moyer 688. 
* Proc. Am. Acad. 20: 345. 1885. 
