Rydberg: Notes on Rosaceae 81 



P. palustris [Comarum L.] — are its narrowly ovate, long-acuminate 

 petals." This character would at once have suggested its relation- 

 ship with P. saxosa, for the latter was originally described as having 

 acute petals. Dr. Wolf, however, seems not to have seen the 

 original description, for he only translates my short description 

 into Latin. In my monograph I gave only abbreviated descrip- 

 tions of the species not found within the United States and Canada. 



Brevifoliae 

 No change in this group has been made since my monograph 

 was published. It consists of only two species, which Dr. Wolf 

 includes in his Ranunculoides. Dr. Wolf claims that a piece 

 of the type of Nuttall'sP. brevifolia is in Lehmann's herbarium and 

 that this has ternate leaves. Occasionally the basal leaves may 

 have but three leaflets, but this is not the usual case. I have 

 seen Nuttall's type, and a duplicate is in the Torrey herbarium ; 

 in both the basal leaves are pinnate with five leaflets. 



RUBRICAULES 



In the North American Flora I recognized nine species. Of 

 these Potentilla proxima was described as new. It is related to 

 P. Macounii, but distinguished by the toothed, not deeply cleft 

 leaflets. It is also of a much more southern distribution, found 

 only in south central Utah and Arizona, while P. Macounii is 

 found only in Alberta and Montana. The following specimens 

 belong to P. proxima: 



Utah : Divide between Sevier and Beaver rivers, near Belknap 

 Peak, July 28, 1905, Rydberg & Carlton 7369; also Aquarius Plateau, 

 Aug. 6, 1905, 7479; mountains north of Bullion Creek, near Marys- 

 vale, July 23, 1905, 7157 and 7153. 



Arizona: Southern slope, San Francisco Mountains, August, 

 1904, Cannon & Lloyd. 



My description of Potentilla rubricaulis Lehm. in my mono- 

 graph was based principally on material collected in the Rocky 

 Mountain region. The species was therefore described as having 

 5—7 leaflets, while the original has only 3-5 leaflets. I saw my 

 mistake and made a correction in the Bulletin of the Torrey 

 Club,* proposing the name Potentilla rubripes for the Rocky 



*Bull. Torrey Club 33: 143. 1906. 



