no 



PITTONIA. 



4 



The nomenclature of page 60 of this volume should be 

 corrected according to the following ; and those in possession 

 of duplicates of the specimens there commented on should 

 alter the labels as I shall now indicate. 



R. SUBSAGITTATUS, var. SUBAFFINI8. R. Arizonicus, var. 



hnjj^ 



R. Arizonicus 



Greene, p. 60 supra, not of Lemmon. I apprehend that this 

 plant of the timber line on San Francisco Mountain may 

 prove specifically distinct from that of the wet meadows far 

 below ; but I leave it, for the present, in the rank accorded 

 It by Dr. Gray. My own comments on the characters of R. 

 Anzomcus given by Dr. Gray are without the least perti- 

 nency, seeing that this is not at all the plant which he had 

 m view. 



^:.-^™^^' ^f' ^ICROI'^TALUS. R. Arizonicus, var. suh- 



I am glad to have been 



ffi 



convinced that it was not this plant, but the preceding, on 



huffinis ; for it differs 



more slender habit, minute flowers, and long cylindrical 



heads of achenes. 



There is a widely dispersed and often collected far- western 



species which has long been wantin specific definition. I 

 call it 



R. ELLlPiicus. B. gluhc-rimus. Gray, Am. Joum. Sci. 2,1 

 !VrS"' J°''-*^'™"-'^>-Colo.7; CouIt.Man.7; Brew. 



Hooker 



Ho 



T^„,, • /./» , . _ — ^'^viv.u.uu^^ xiooK. i^oua. 



lismmfi 



, , "' -— -• ^. ^v:!:, xjui oi u-eyer. very 



fattir^ '"' "^T"}' ^ °' ^ '"'^'^ ^'e\ from a Urge 

 fa e e of pere„u,„T fleshy-fibrous roots : radical learfs 



the blade ; cauliue narrower, often cleft into two or three 



