464 Rydberg: Notes on Rosaceae 



The following ninety-three tentative hybrids have been re- 

 corded. Their essential characters have been pointed out in the 

 North American Flora, but in that work no specimens are cited, 

 except the types of new species and the first records of new hybrids. 

 It is, however, valuable to students of the brambles to know what 

 specimens the monographer regarded as such hybrids. I have, 

 therefore, prepared the following list of specimens. 



Ruhus acaidis X steUatiis. 



Alaska: 1885, Huff; Copper Center, Heidman 88. 



Ruhiis acaulis X puhescens. Ruhus propinquus Richardson is 

 regarded as a synonym of this. 



Mackenzie: Hay River, July i, 1903, Preble & Gary 25; 

 wooded country, Richardson. 



Ruhus arcticus X puhescens.* 



Quebec: Mt. Albert, Gaspe County, 1906, Fernald & Collins 

 623a; Table-top Mountain, Fernald & Collins 6iy. 



Ruhus arcticus X saxatilis {R. castoreus Frees). No locality 

 has been recorded on this side of the Atlantic, but it may be expect- 

 ed in northeastern Canada. 



Ruhus idaeus X spectahilis. This is unknown except as a 

 garden plant, and it is natural that it should be so, as Ruhus idaeus 

 and R. spectahilis have no common territory where both grow wild. 

 Indigenous hybrids of R. spectahilis and species related to R. idaeus 

 have been collected in Alaska, viz., the two following: 



Ruhus spectahilis X vihurnif alius . 



Alaska: Lake Clark, 1902, Gorman. 



Ruhus spectahilis X suharcticus. 



Alaska: Camp 53, 1899, Shrader. 



Ruhus occidentalis X rosaefolius. Known only as a garden 

 hybrid. 



Ruhus idaeus X ursinus. Only known as a spontaneous garden 

 hybrid, which is under cultivation as the Logan Berry. 



Ruhus idaeus X phoenicolasius. R. Paxii Focke. Only known 

 as a garden hybrid. 



* In answer to a letter to Dr. Fernald suggesting that the plant collected by him 

 and Mr. Collins was a hybrid, I received the following reply: " I have no doubt that 

 the plants you refer to are hybrids of Ruhus Iriflorus and arcticus. Such specimens 

 are found in small colonies throughout Gaspe, Newfoundland, and southern Labrador, 

 wherever R. arcticus occurs." 



