CALIFORNIA ACADEMY OF SCIENCES. 207 



three bright white, terminating at the base of the nutlet, 

 not crossing it; ventral face of nutlet muricate. 



Common from Southern California to Washington Terri- 

 tory, and for some distance eastward. 



K. cycloptera. 



Nutlets all winged : wings brownish, not abruptly narrow- 

 ing and ending on each side of the nutlet below, but con- 

 tinuous across the base of it: ventral face not muricate. 



Arizona, at Tucson, Pringle, and probably eastward into 

 New Mexico. 



This clearly distinct species was, I judge, mixed with the 

 original Eritrichium pterocaryum, Torr., for he had plants 

 from far eastward, collected by "Wright & Bigelow; but the 

 figure in Bot. "Wilkes' Exp. is made from the preceding, 



* * Nutlets not winged. 



K. Oyxgona, Gray, 1. c. 276 in part. 



Nutlets sharply angled, and sparsely muriculate. 

 Mohave Desert. Pringle, 1882. 



K. Mohavensis, 



Nutlets not sharply angled, very smooth and shining, with 

 no trace of muriculation. — K. oxygona, Gray, 1. c. as to the 

 plant of Mrs. Curran. 



Muriculate and smooth nutlets are surely inadmissible in 

 the same species, hence the necessity of separating the two 

 last. 



The above four species appear to constitute a most natural 

 section of Krynit?Ma, all being annuals, with a peculiar 

 habit, light green herbage, broad calyx-lobes, and nutlets of 

 a distinctive shape. The presence or absence of wings is 

 shown by the first species, not to be of sub-generic value. 

 The intrusion of K. Jwloptera and K. setosissima under Ptery- 

 gium appears to me to be artificial, and destructive of this 

 otherwise well marked section, and I would rigidlv exclude 

 them. 



