216 PITTONIA. 



sides dark-brown, glabrous : pappus of 4 barbellate bristles 

 and as many intervening deeply fimbriate-lacerate rounded 

 minute scales. 



B. RiPARiA. A foot high or less, pale green and sparsely 

 pubescent : leaves flaccid, an inch long, broadly liuear-lanceo- 

 late, remotely serrate, somewhat auriculate at the broad base: 

 heads 1| lines high, 2| lines broad : achenes barely | line long. 



This remarkable plant, wearing decidedly the aspect of a 

 small Erigeron, \mi with fruit characters of the Helenioidese, 

 inhabits low ground along the banks of the lower San Joaquin 

 Kiver, California, where it is associated with Ilysanihes gratio- 

 hides. In point of habitat, as Avell as habit, it suggests at 

 once Eclipia, and SpUanthes, yet it can not by any means he 

 referred to either of those genera ; for the receptacle is plane, 

 and destitute of chaff or bristles. The genus is dedicated to 

 the discoverer, Mr. Frederic Theodore Bioletti of the Uni- 

 versity of California. 



New or Noteworthy Species. 



XI. 



CEnothera 



Annual, the very s 



— .^,^-^^i.i.. ^^Liixy^iiAj ui!.±'itJiasA. iinnuai, uie veiy mwi.. 



branches 2 or 3 feet long, prostrate, only the spicate ends 

 assurgent ; herbage covered with a rather dense but short, 

 somewhat appressed pubescence : leaves elliptic-lanceolate, 

 acute, tapering to a short petiole, the margin rather remotely 

 serrulate : spike elongated, leafy-bracted : calyx-tube 1 inch 

 long or more ; tips of the segments not closely contiguous in 

 the bud : petals cuneate-obcordate barely 5 lines long, yel- 

 low : anthers exserted : stigma-lobes linear, scarcely spread- 

 ing in maturity, of a vivid green. 



Mr 



ship from near Custer, Montana. In such fragmentary 



