500 Rydberg: Notes on Rosaceae 



Cercocarpus alnifoliits Rydb. This is the same as C. 

 betulaejolius Blancheae of C. K. Schneider, mainly; although that 

 author had included some specimens of C. Douglasii mixed in with 

 the type. As a species had already been named after Mrs. 

 Blanche Trask, viz. C. Traskiae, it would be bad taste to propose 

 another one. Besides personally I dislike the use of the given 

 name of a person as forming the specific name. I, therefore, 

 adopted the more appropriate C. alnijolius instead of the varietal 

 name Blancheae. This species is also endemic to Santa Catalina 

 Island, California. 



Cercocarpus betuloides Nutt. Hooker in his Icones changed the 

 name to C. betulaejolius , which form has been more commonly 

 adopted than the original. It has also been regarded as a variety 

 of C. parvifolius Nutt., i. e. of C. montanus Raf., but is evidently 

 distinct. 



Cercocarpus minutiflorus Abrams. Nothing further has been 

 added to the knowledge of this species since its publication. 



Cercocarpus flabellifolius Rydb. In Utah and northwestern 

 New Mexico is found a mountain mahogany, having the pubes- 

 cence of the Californian C. betuloides and the coarse toothing of 

 the leaves of C. montanus. It has obovate leaves as the latter, 

 but much broader and with more flaring teeth. This character 

 is best seen in the type collected by L. F\ Ward. The following 

 specimens are to be referred here: 



Utah: Glenwood, 1875, Ward 122; western slope of La Sal 

 Mountains, 191 1, Rydberg & Garrett 8566; south side of Abajo 

 Mountains, 9275; Juab, 1902, Goodding 1073; Silver Reef, 1894, 

 Jones 5163, 5163b; Laccolite, Jones 5663, 5204c; Marysvale, 

 Jones 5405d; Cedar City, Jones 5208, 5404d; Salina Canyon, 

 Jones 5441m; Fish Creek Canyon, 1909, Garrett 2523. 



New Mexico: Aztec, 1899, Baker 384. 



Cercocarpus argenteus Rydb. This is related to C. montanus, 

 but the pubescence is appressed-silky, the leaves narrower, toothed 

 above the middle with smaller teeth. The following specimens 

 belong here : 



Texas: Randall County, Eggers; Llano Estacado, Bigelow 

 (Whipple Exp.); Guadalupe Mountains, 1901, Bailey 436. 



New Mexico: El Capitan Mountains, 1900, Earle 209; same 



