126 Rydberg: Notes on Rosaceae 



dwarf and simple-leaved species; but many of the Orohati have 

 also simple leaves, and R. pumilis has sometimes three-foliolate 

 ones. The species mentioned is the type of Greene's genus 

 Cardiohatus. 



Ruhus pumilus Focke must be a very local species. The only 

 specimens I have seen (the type has not been available) are the 

 following : 



Mexico: Ixtaccituatle, 1903, Purpiis 241. 



Chihuahua: Mt. Mohinora, 1898, Nelson 4863. 



Ruhus nivalis Dougl. Mr. J. M. Macoun thought that the 

 descriptions of this species in Hooker's Flora Boreali-Ameircana 

 and in Howell's Flora of Northwestern America did not apply to 

 the same species and substituted the name R. pacificus for the 

 latter. I can not see why Howell's description does not apply to 

 R. nivalis Dougl. Focke has the same idea of R. nivalis Dougl. 

 as myself. 



Ruhus glahratus H.B.K. This species of wide distribution in 



the Andes of South America has been reported from Costa Rica 



{Pittier i6f)\ but I have seen no specimens from there, neither 



had Dr. Focke. 



Rosaefolii 



This group comprises the Spectahiles, Rosaefolii, and perhaps 

 some other sections of Focke's subgenus Idaeohatus. The Spec- 

 tahiles constitute the Greenean genus Paramena as originally con- 

 stituted, but its author on some subsequent pages extended the 

 genus to include simple-leaved species of the section Corchorifolii 

 of Focke. 



Ruhus spectahilis Pursh. This is usually described as being 

 unarmed. Occasionally, however, it has a few small straight 

 prickles. Prickles are more common in the next species. 



Ruhus franciscanus Rydb. This has been mistaken for R. 

 Menziesii Hook., which, however, is the same as R. ursinus, as 

 pointed out by Dr. Focke. This mistake depended perhaps on 

 the suggestion made in Hooker's Flora that the petals were 

 probably red. Watson, therefore, named the present species R. 

 spectahilis Menziesii and Greene included it in Parmena under the 

 name P. Menziesii. 



Ruhus rosaejolius has been collected gtowkig spontaneously 



