Rydberg : RocKV Mountain flora 143 



Potentilla platyloba Rydb. 



Potcntilla hipinnatifida platylota R\'db. Mem. Dep. Bot. Columbia 



Univ. 2 : lOO. 1898. 



This is as distinct from P. bipiiiiiatifida as most species oi Po- 

 tcntilla are from tiieir relatives. 



Potentilla rubripes Rydb. 

 Potcntilla nihricanlis Rydb. Mem. Dep. Bot. Columbia Univ. 2: 



lOi. 1898. Not P. nibricanlis Lehm. 1830. 



Lehmann's species, for which I mistook this Rocky Mountain 

 plant, is the same as P. prostrata Rottb. 



Argentina argentea Rydb. 

 Argentina anscrina concolor Rydb. Mem. Dep. Bot. Columbia 



Univ. 2 : 160. 1898. Not Potentilla anscrina concolor Ser. 



1825. 



The European plant to which this was referred differs in having 

 more deeply and more sharply toothed leaflets, and smaller flowers. 



Fragaria ovalis (Lehm.) Rydb. 

 Potcntilla ovalis Lehm. Ind. Sem. Hort. Bot. Hamb. 1849 : 9. 



1849. 

 Fragaria firnia Rydb. Mem. Dep. Bot. Columbia Univ. 2 : 184. 



1898. 



Dr. Wolf, of Dresden, Germany, has called my attention to 

 the fact that P. ovalis Lehm. is no Potcntilla at all. Prof. Leh- 

 mann did not cite any type, but his herbarium shows that it was 

 Fendlcr 206, which I included in Fragaria firnia. 



Fallugia acuminata (Wooton) Rydb. 

 Fallugia paradoxa acnniinata Wooton, Ikill. Torrey Club 25 : 306. 

 1898. 



Prunus melanocarpa (A. Nelson) Rydb. 

 Cerasns dcniissa melanocarpa A. Nels. Bot. Gaz. 34: 25. 1902. 

 The common Rocky Mountain tree is well distinct from the 

 original Cerasns dcniissa Nutt. or Priinns dcniissa Walp. The lat- 

 ter, which was from the Columbia Valley, has thin, very pubescent 



