Rydberg: Notes on Rosaceae 83 



to three achenes are developed, it remains so even at maturity, 

 but if more achenes develop the fruit becomes pear-shaped or 

 globose. The form Of the fruit is, therefore, no specific character. 

 R. apiculata Greene and R. piscatoria are forms of this species. 

 The former will be discussed in a subsequent paper. The latter 

 represents a strong more bristly form of R. prionota. 



Rosa prionota is more com.mon in California than the typical 

 R. gymnocarpa. 



33. Rosa dasypoda Greene, Leaflets 2: 260. 1912 



This is perhaps a good species. I had segregated out the same 

 as such, although I had assigned as the type a Californian specimen 

 which shows the characters better than Dr. Greene's type. The 

 flowers are nearly always corymbose, i. e., two to four together and 

 leafy-bracted, the leaflets thicker and not with semi-pellucid veins, 

 the teeth broader and more rounded, and the fruit is larger, 6-8 

 mm. instead of 4-6 mm. in diameter. 



It ranges from British Columbia to northern California, where 

 it is represented by the following specimens: 



California: Siskiyou County, Copeland [Baker's distribution 

 number] 38^4. 



34. Rosa Bridgesii Crepin, Bull. Soc. Bot. Belg. 15: 54. 1876 



This is a good species and is the same as R. gymnocarpa puhes- 

 cens S. Wats.* and R. crenulata Greene.f Crepin gave this species 

 a short description, but later, after seeing Watson's treatment of 

 the same, retracted and reduced it to a variety. I was a little 

 doubtful whether the name R. Bridgesii belonged to this species 

 or to R. sonomensis or to some related species, but Miss Eastwood, 

 who has seen the type of R. Bridgesii, has told me that it is the 

 same as R. gymnocarpa puhescens S. Wats. The following speci- 

 mens have been seen from California: 



California: Bridges 95; Pine Ridge, Fresno County, Chandler 

 lyi; Baker 5500; Silver Mountain Pass, Brewer 1915; Havelock, 

 Kern County, Grinnell 277; Tuolumne Big Trees, 191 1, Abrams 

 4701; Shut Eye Pass, 1912, 492S; Yosemite Park, 1915, 5407. 



*Bot. Calif, i: 187. 1876. 

 t Leaflets 2: 255. 1912. 



