﻿Rydberg: Notes on Rosaceae 139 



Ruhus fagifoliiis Cham. & Schlecht. I have seen no specimens 

 of this species, but both Schlechtendahl's and Liebmann's descrip- 

 tions, as well as the illustration given by Focke, show clearly 

 that it is closely related to, but perfectly distinct from, R. scandens. 



Floribundi 



Ruhus philyrophyllus Rydb. This species was first described as 

 R. tiliaceus by Liebmann, but afterwards the name was changed to 

 R. tiliaef alius by Dr. Focke on account of the earlier R. tiliaceus 

 Smith. When proposing the new name Dr. Focke knew that 

 there was a Ruhus tiliaefolius Weihe, but he claims that the 

 latter is a synonym and hence the name is available. There is a 

 difference of opinion concerning this fact, and some authors re- 

 gard also R. tiliaceus Smith as a synonym, which would make R. 

 tiliaceus Liebm. available. The use of homonyms will always 

 cause confusions and an unstable nomenclature. The permitting 

 of the use of homonyms is one of the few features which makes it 

 impossible for me conscientiously to subscribe to the, in general, 

 excellent Vienna Code. I have seen no specimens, only a photo- 

 graph of Liebmann's type. The leaf-form is, however, very 

 distinct. Only two species and these of the R. sapidus group have 

 leaflets approaching those of this species in outline, but in both 

 the fruit is glabrous. 



Ruhus Liebmannii Focke. The specimens collected at Cerro 

 de Sempoaltepec, Oaxaca, were included in R. tiliaceus by Pro- 

 fessor Liebmann. The leaves of these specimens are quite different 

 from those of the type of R. tiliaceus. In the herbarium of the 

 New York Botanical Garden there are two photographs, one from 

 the specimen in Liebmann's herbarium with Dr. Focke's label on 

 it, the other from the specimen in Dr. Focke's own herbarium. The 

 following specimens, which agree with these photographs as well 

 as with Focke's description, I refer to this species. 



Oaxaca: northwestern slope of Mt. Zempoaltepec, July lo, 

 1^94, E.W.Nelson 675. 



Vera Cruz: Orizaba, 1853, Fred Mueller 1341. 



Ruhus coriifolius Liebm. was described by Liebmann as having 

 few carpels and rose-colored petals. One of Liebmann's speci- 

 mens in fruit is found in the herbarium of the New York Botanical 



