Rydrerg: Notes on Rosace ae 367 



besides D. agrimonioides (= D. argnta) and D. glandulosa until 

 my revision in the North American Flora. Howell* admits 

 Potentilla glutinosa, P. ciliata (= D. ashlandica), P. fissa, P. 

 glandulosa, P. Wrangelliana, P. reflexa, and P. rhomboidea. 

 Piperf admits Drymocallis rhomboidea, D. pseudorupestris, D. con- 

 vallaria, D. valida, D. glandidosa,D. glabrata, and D. Wrangelliana. 

 Blankinshipl, who belongs to the conservative school, admits 

 Potentilla fissa and P. rhomboidea besides those found in my Flora 

 of Montana, viz., Drymocallis argnta, D. convallaria, D. pseudo- 

 rupestris, D. glutinosa, and D. glandulosa. Heller§ admits all the 

 species included in my monograph of 1896. Hall || admits Poten- 

 tilla lactea and includes Drymocallis viscida Parish under the name 

 Potentilla glandulosa nevadensis. Jepson,^l who is very "con- 

 servative," on the contrary admits but one species, viz., Potentilla 

 glandidosa. The plant described by him, however, is not P. 

 glandidosa Lindley, but P. Wrangelliana. 



CHAMAERHODOS 



The American species of this genus has been regarded as 

 identical with the Siberian Chamaerhodos erecta (L.) Bunge. 

 Nuttall, one of America's most acute botanists, was the first to 

 see the difference between the American and the Asiatic plant, 

 and named the former Chamaerhodos erecta parviflora. Pickering 

 regarded it as a distinct species, but his name C. Nuttallii was 

 not properly published before the appearance of my revision in 

 the North American Flora. In Torrey and Gray's Flora it 

 appears as a synonym. The American plant has usually smaller 

 flowers, the branches of the flat-topped inflorescence are strongly 

 ascending, the pedicels erect or nearly so, and even in fruit scarcely 

 exceeding the flower in length, while in C. erecta they are ascending 

 and much longer. 



New York Botanical Garden. 



* Flora of Northwest America. 



t Flora of Washington. 



t Montana Agricultural College Studies, i, part i. 



t Catalogue of North American Plants, edition 2. 



|| Botanical Survey of San Jacinto Mountains. 



^ Flora of Western Middle California. 



