488 Rypsperc: Notes on RosacEAE 
-Uran: Big Cottonwood Cafion, 1905, Garrett 1614. 
Potentilla Elmeri resembles P. Pecten in habit but is silky, 
not at all tomentose. It is represented by the following: 
CattrorniA: Griffins, Ventura County, 1902, Elmer 4000; 
Donner Lake, 1903, Heller. 
Potentilla subvillosa and P. comosa are very local and are 
represented by the type collections only. 
Dr. Wolf in his monograph and Professor Aven Nelson in 
the New Manual of Botany of the Central Rocky Mountains 
unite Potentilla Bakeri and P. viridescens, and the former reduces 
both to a variety of P. gracilis. P. viridescens is evidently related 
to P. gracilis and differs in the characters presented by Dr. Wolf; 
but P. Bakeri has the leaves dissected to near the midrib into 
linear or linear-oblong and obtuse, not lanceolate and acute divi- 
sions. P. Bakeri has spreading pubescence on the stem, and the 
leaves are rather densely tomentose beneath. I have collected 
Potentilla Bakert myself in Utah and P. viridescens in Montana 
and know that they both hold their characters well. Besides 
the specimens cited by me in the original publication, the following 
represent P. Bakeri: 
UtaH: Wahsatch County, near Midway, 1905, Carlton & 
Garrett 6721 and 6696; Juab, June 10, 1902, Goodding 1092; Big 
Cottonwood Cafion, Aug. 14, 1905, Garrett 1614; Hot Pots, 
Wahsatch County, Garrett F726. 
Wvyominc: Chug Creek, Albany Co., June 29, 1900, Aven 
Nelson 7318 (not 7317, which is cited by Dr. Wolf under P. 
gracilis viridescens). 
PECTINISECTAE 
This group contains four species, of which Potentilla longiloba 
is described as new. It resembles P. Blaschkeana in habit, but 
the leaves are loosely villous-tomentose above. 
specimens belong here: 
Montana: Lo Lo, May 29, 1897, Elrod and assistants 110; 
Gallatin Valley, near Bozeman, 1896, Flodman 563, in part. 
WASHINGTON: Pullman, June, 1903, Piper 4134. 
BritIisH COLUMBIA: Near international boundary between 
Kettle and Columbia rivers, June 25, 1902, Macoun 63901. 
Ipano: Clear Water, Spaulding. 
The following 
