Rydberg: Notes on Rosaceae 167 



19. Rosa puberulexta Rydberg 

 This species belongs to the Great Basin and is related to 



R. arizonica and R. neomexicana. The following specimens are 



referred here, though somewhat doubtfully: 



Washington: Wilson Creek, Sandberg & Leiberg; Rattlesnake 



Mountains, Cotton 469. 



Oregon: Antelope Creek, Applegate 2399; Cold Spring, 



Coville & Applegate 1122; Wallowa, Samson & Pearson 78. 



20. Rosa delitescens Greene 

 This is related to R. californica but characterized by the 

 double-serrate leaflets, glandular-pruinose beneath and with gland- 

 tipped teeth, and by the subglobose fruit. It is known only from 

 the type locality in the Siskiyou Mountains, Oregon. 



21. Rosa rivalis Eastwood 



This species belongs to the Californian flora (see notes, Bull. 

 Torrey Club 44: 74. 1917) but the following specimen has been 

 collected in Oregon: 



Oregon: Cold Spring, Crook County, 1898, Coville & Apple- 

 gate 131. 



22. Rosa Fendleri Crepin 



23. Rosa Woodsii Lindl. 



24. Rosa Macounii Greene 



These three species belong to the Rocky Mountain region but 

 extend west into the Cascade Mountains. They will be treated in 

 a subsequent paper. 



25. Rosa myriantha Carr. 



This is primarily a Californian rose (see notes, Bull. Torrey 

 Club 44: 75, 76. 1917), but the following specimens belong here: 



Oregon: Barlow Gate, Lloyd; lower Albina, Portland, Sheldon 

 10659; Wimmer, Hammond 119, in part. 



26. Rosa pisocarpa A. Gray 



27. Rosa ultramontana (S. Wats.) Heller 

 These two species have been treated previously, under the 



Roses of California and Nevada (see Bull. Torrey Club 44: 77, 78. 

 191 7). Though the former has its best development in the 



