328 Rydberg: Studies ox the Rocky Mountain flora 



are densely stellate-pubescent and their tips not incur\ed but 

 spreading. The pods of D. andina and D. pectinata are nearly the 

 same, but that of D. densiflora is larger and more elongated. 



Nelson, in the New Manual of the Central Rocky Mountain 

 Region, cited Draha tiher A. Nels., D. aiireformis Rydb., and D. 

 deciimbcns Rydb. as synonyms of D. luteola Greene. The spe- 

 cies he described under that name is evidently D. a urea Vahl, 

 of which D. uher apparently is a synonym. D. luteola and D. 

 aiireformis, on the contrary, are closely related to D. surcidifera A. 

 Nels. but have light yellow flowers. A " conservati\'e " botanist 

 would unite the three. D. decumhens Rydb. is not closely related 

 to either. Very likely Professor Nelson had not seen a specimen 

 of the last named. 



Fortunately, Draba lapilntea A. Nels. and D. yellow stonensis 

 A. Nels. become synonyms of D. praealta Greene. Draha deflexa 

 Greene has erroneously become D. reflcxa in the New Manual. 



New York Botanical Garden. 



