Rydberg: Notes on Rosaceae 365 



the leaflets, especially the terminal ones, are rhombic-obovate and 

 the plant scarcely at all viscid. D. laxiflora is more closely 

 related to D. viscida Parish, but differs in the broader ovate or 

 oval bractlets, the more elongated and slender branches of the 

 inflorescence, and the simple-toothed leaflets. 



The following specimens belong to Drymocallis reflexa: 



California: Little Green Valley, San Bernardino Mountains, 

 1904, R. Hall 7; Nevada Falls, Yosemite Valley, 1902, Hall & 

 Babcock 3430. 



For several years there have been in the herbaria of the New 

 York Botanical Garden, of Columbia University, and of the 

 United States National Museum, several specimens resembling 

 in many respects Drymocallis Wrangelliana and D. oregana, but 

 with minute whitish petals. They could not be included in any 

 of the previously described species. They resemble most closely 

 D. viscida Parish, but the petals are white or whitish, not yellow, 

 the plant is less viscid and the bractlets narrower. Besides, 

 D. viscida was known only from southern California, and the 

 specimens referred to come from Washington and British Colum- 

 bia. In the North American Flora these specimens were de- 

 scribed under the name D. albida. To it belongs the following 

 material : 



Washington: Damp or shady places at Bingen, 1893, Suksdorf 

 220Q; Clallam County, June 1900. Elmer 2326. 



Oregon: Forest Grove, June 3, 1893, F. E. Lloyd. 



British Columbia: Chilliwack Valley, July 10, 1901, /. M. 

 Maconn 34412 and 34441. Skagit Valley, June 1905, J. M. 

 Macoun 6qq3q; Mt. Finlayson, Vancouver Island, June 3, 1887, 

 John Macoun. 



While collecting in Utah in 1905, the writer discovered another 

 species closely related to the preceding, but differing in the 

 orbicular instead of obovate petals and in the shorter and broader 

 sepals. It was described in the North American Flora under the 

 name Drymocallis micropetala. The following specimens belong 

 to it: 



Utah: City Creek Canon, June 9 and 12, 1905, Rydberg 6153; 

 same locality June 9, 1883, Leonard 105; Red Rock Canon, June 

 11, 1905, Rydberg 6074. 



