226 PITTONIA. 
SENECIO DENsus. S. compactus, Rydb. in Mem. Torr. Club. 
v. 342, long antedated by the S. compactus of Kirk in Trans. 
New Zealand Inst., xii. 395 (1879). 
Hieracium Trai. H. Greenii, Britton, Bull. Torr. 
Club, xx. 120. The eastern H. Greenii is by years more 
recent than the Californian H. Greenei, Gray. Dr. Britton 
probably knew all this; but I think no other botanist will 
be found of the opinion that Greenii and Greenei are dif- 
ferent names. 
ABRONIA AMMOPHILA. A. arenaria, Rydb. Fl. Montana, 
137 (1900), a name precluded by A. arenaria, Menzies. 
