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400 Rvdberg: Notes on Rosaceae 



name was changed to V. californica by Sargent, although the 

 plant Is not found within the state of California. Spiraea cali- 

 fornica differs, however, somewhat from Vaiiqnelinia corymbosa of 

 the Mexican Boundary Survey, having broader and less tomentose 

 leaves. Whether the two forms represent two distinct species or 

 not is hard to tell, as the author has seen but one specimen 

 resembh'ng the type of the former, and both this specimen and 

 the type are but fragmentary. 



The other plant, named V. corymbosa^ is a shrub from Chi- 

 huahua and best represented by Pringle's no. 5. This is charac- 

 terized by its narrow leaves and has therefore received the name 

 K angustifolia. It is represented by the following specimens : 



Mexico : Santa Eulalia Mountains, state of Chihuahua, 27 

 May, 1885, C. G. Pringle j (flowers); 14 Aug., 1885, Pringle 

 j6p (fruit); 1885, E. Wilkinso?i (flower^). 



As stated before, neither of these could be referred to V, corym- 

 bosa Correa. Neither could they be referred to V. Karwinskyi 

 Maxim, Of the latter I had seen no specimen, but Maximowicz's 

 description was ample enough to determine this fact. The author 

 therefore made a key and drew the description of the four species 



I 



as well as he could from the herbarium material of two of them 

 and the descriptions of the two others. While the monograph was 

 in press some material was received from Washington, and in this 

 material were found specimens of the two missing species. There 

 was, however, only little to be added or modified in the descrip- 

 tions, V. corymbosa is represented by the following specim*ens : 



Mexico: Ixmiquilpan, Hidalgo, Aug., 1905, C. A, Purpis 

 13S4, 



V. Karwinskyi by the following : 



Mexico: Alvarey, San Luis Potosi, May 19-22, 1905, E. 

 Palmer S94-: perhaps also, San Lorenzo Canon, six miles south- 

 east of Saltillo, Coahuila, April 16, 1905, E. Palmer 538. 



Sericotheca 

 According to the Vienna Rules and Harms' list, Holodiscus 

 Maxim, should be retained in preference to Schizonotus Raf. If 

 there were any regard to priority, such a provision would be un- 

 necessary, for Schizonotus Raf (1838) is a homonym of the older 



