404 Rvdberg: Notes on Rosaceae 



but has more hairy leaves and fruit like that of S. argentea. It 

 may be Schizonohis argejitetis mexicanus O, Kuntze, but it is 

 scarcely Spiraea inexicana Schiede. I refer to it the following 



Specimens : 



Mexico : Sierra de San Filipe, Oaxaca, Sept. 25, 1894, diaries 

 L, Smith 821 ; 1894, E. W. Nelson io8j ; 1894, Prmgle ^yj^. 



FiLIPENDULA 



As represented in North America, this genus could very well 

 be divided into 4 genera, viz. : 



1. Ulmaria Hill, with F. Ulmaria and F. denndata, 



+ 



2. FiLIPENDULA Adans., with F, Filipendida, 



3. Thecanisia Raf., with /^ rubra. 



4. [Unnamed], with F, kanitschatica and F, occidentalism 

 Several of the Asiatic species, however, combine the charac- 

 ters of two or more of these genera and the generic lines disappear 

 altogether. It was therefore deemed advisable to keep them as a 

 single genus. 



HORKELIA 



Three species of this genus had been published since my 

 Monograph of the North American Potentilleae.* These are : 

 H. glandulosa Eastwood, H. Wilderae Parish, and H, Rydbergii 

 Elmer. All of these are known from the type localities only. 

 Six were proposed as new in the North American Flora, viz. : //. 

 trnncata^ H. Brownii, H. tenuisecta, //. intcgrifolia, H. pulchra, 

 and H, hispidula. Of these H. ti'iincata and H. tenuisecta were 

 partly known to the waiter when his monograph was prepared, 

 but were there included in other species. Two sheets of the 

 former were included in //, platycalyx which it resembles in floral 

 structure. These specimens were : 



Lower California : Guadalupe Mountains, 1883, C. R. Orcntt 

 840 (labeled Horkelia californica pancifoliata Wats.). 



They were not very good specimens and therefore not so 

 critically studied. Better specimens have been seen since. The 

 best of these is in the herbarium of the University of CaHfornia. 

 Although the specimen was from a cultivated plant, it was desig- 

 nated as the type. 



*Mem. Dep. Bot. Columbia Univ. 3 : 1898. 



