Rydberg: Notes on Rosaceae 69 



Old World and are represented in this country by a few intro- 

 duced species. 



I, Rosa rubiginosa L. Mant. 2: 564. 1771 



The sweet brier is often cultivated and has escaped in many 

 places in this country. In some parts of the eastern United States 

 it is thoroughly naturalized. On the western coast it has estab- 

 lished itself in several places in Oregon and Washington, but the 

 writer has seen herbarium specimens only from one place in 

 California. On account of its stout prickles it has been confused 

 with R. nutkana, to which it has no close relationship. 



California: Yreka, 1910, Geo. D. Butler 1427, 1802. 



II. CINNAMOMIAE. This group is represented in Cali- 

 fornia and Nevada only by species of the true Cinnamomiae, 

 i. e., species with infrastipular spines usually present. 



2. Rosa nutkana Presl, Epim. Bot. 203. 1849 



Although an easily distinguished species, except from the next 

 two species, it has been mistaken for R. fraxinifolia Borkh. (i. e., 

 R. hlanda Ait.) and R. Woodsii Lindl. It has also been named 

 R. caryocarpa Dougl. and R. Lyalliana Crepin, but these names 

 have not been published except in synonymy. R. aleutensis 

 Crepin is probably an unarmed form of this species. R. nutkana 

 is distributed from Alaska to northern Wyoming and Oregon. 

 It has also been reported from northern California, but the writer 

 has no definite locality cited. Perhaps the record is based on 

 specimens belonging to either of the next two species. 



3. Rosa MURicuLATA Greene, Leaflets 2: 263. 1912 



This species is closely related to R. nutkana and perhaps not 

 specifically distinct. It differs in the thicker and smaller leaves 

 densely glandular-muricate beneath and in the often corymbose 

 inflorescence. It ranges from British Columbia to northern 

 California. 



California: Mad River, Humboldt County, 1878, Violet 

 Rattan; Areata, Humboldt County, 1899, Dudley. 



