Rydberg: Notes on Rosaceae 147 



Ruhus macropetalus Dougl. This was mainly described from 

 the staminate plant, while Ruhus myriacanthus Dougl., described 

 at the same place, is characterized from a more than usually- 

 prickly pistillate individual. 



Laciniati 



Ruhus laciniatiis Willd. The origin of this species seems to 

 be unknown. It has been cultivated more than a century at least, 

 is not unknown in gardens, and has become naturalized at many 

 places. The following specimens may be recorded: 



Washington: Chehalis River, 1897, Lamh 1244; Quiniault 

 Valley, 1902, Conard 216; Montesano, i8g8, Heller 4001. 



Oregon: Forest Grove, 1894, Lloyd; Oregon, 1903, Lunell. 



British Columbia: vicinity of Nanaimo, Vancouver Island, 

 1908, John Macoun iqSsq; Victoria, John Macoun 19658. 



Pennsylvania: Point Pleasant, 1898, Fretz; Bethlehem, 1905, 



Ran. 



Discolores 



Ruhus Linkianus Ser. This is usually known as Ruhus fruti- 

 cosus among gardeners but has little to do with the original R. 

 fruticosus L., which belongs to another group of blackberries. 

 R. Linkianus has usually double flowers in cultivation and most 

 escaped plants also bear such; the simple-flowered state is found 

 in the United States only as a ballast plant. 



New Jersey: Camden, 1897, Pollard (ballast). 



Maryland: Fredericks town, 1816, Commons. 



Ruhus cuneifolius Pursh has an extensive distribution from 



Connecticut to Florida but is practically confined to the coastal 



plains. 



Arguti 



Ruhus sativus (Bailey) Brainerd. This was originally described 

 as R. nigrohaccus sativus. President Brainerd raised it to specific 

 rank, although the plant he really had in mind was not this but 

 another species which I have named R. Brainerdi after him. Mr. 

 Blanchard regards it as a cultivated form of R. nigrohaccus, but 

 the plant is found in the wild state, although not very common. 

 It may have arisen through the crossing between R. nigrohaccus 

 with R. frondosus or R. Baileyamis, but it is now found further 



