404 Rydbekg : Notes on Rosaceae 



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

 may be Schizonotiis argenteus )>iexicaniis O. Kuntze, but it is 

 scarcely S/>iraea inexicana Schiede. I refer to it the following 

 specimens : 



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

 L. Stfiith 821 : 1894. E. IT. .WAw/ loSj ; 1894, Pring/e jjj;^. 



FiLIPENDULA 



As represented in North America, this genus could \er}- well 

 be divided into 4 genera, viz. : 



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



2. FiijPENDULA Adans., with F. Filipendiila. 



3. Thecanisia Raf , with F. rubra. 



4. [Unnamed], with F. kaintschatica and F. occideutalis. 



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. glandii/osa Eastwood, H. Wilderae Parish, and H. Rydhtrgii 

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

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

 tnuicata, H. Brcnvnii, H. tenuisecta, H. iiitcgrifolia, H. pulcJira, 

 and H. Juspidula. Of these H. truncata and H. tenuisecta were 

 partly known to the writer when his monograph was prepared, 

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

 former were mcluded in //. platycalyx which it resembles in floral 

 structure. These specimens were : 



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

 S^o (labeled Horkelia californica paucifoliata 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 Universit}' of California. 

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

 nated as the type. 



*Mem. Dep. Bot. Columbia Univ. 2 : 1S98. 



